Were you truly eating in total what you mentioned, or did you follow MFP method and correctly eat back exercise calories, so actually eating more than you stated?

Separate 2 things, unless you really had 2 tests done.
1 - RMR was the face mask sitting there for 15-20 min breathing normal.
2 - BF% test is Bodpod, hydrostatic, or DEXA. But BIA, handheld, calipers, measurements, electrodes, or other is measurement calculated and while it can be decent and perhaps right on, it is an estimate, not as accurate as RMR, but can be interesting to compare. It's of course the best thing to use whether accurate or not.

So based on the RMR test, your calculated BMR based on same is 959.
So BMR 959, RMR 1100.

Considering avg gal your age, weight, height, composition could be Mifflin BMR 1423, yes, that's terrible, and way outside the 5% range of expected accuracy. But with all your tests decent, usually means less LBM than average, and/or you've suppressed your metabolism.

So based on the given BF 42.8% and LBM 40 kg, your calculated would be Katch BMR 1235 and Cunningham RMR 1381.
So going by just expected based on LBM, you are still terribly under where you probably could be.

Now, depending on how that BF% was obtained, tested or measured, there may be a range of accuracy that makes it not so terrible, but even if you say you were at 47.8% BF on outside range of 5% accuracy, with BMR 1159 and RMR 1304 at that level, your tested BMR 959 and RMR 1100 is still 5% outside that range even. Still under by 200 calories, so your TDEE would even be lower by that or likely more.

So you can take that knowledge 2 different directions. 1 study showed that a suppressed metabolism took 6 yrs to recover. I don't recall the details of that study because I've gotten in to another one lately in my blog.

1 - You can accept the fact you made your body more efficient than it needed to be, and your TDEE is going to be lower than it could have been. Meaning to lose weight you'll have to eat very small likely a great future chunk of time.
If your compliance of eating small amounts is good - that may be no problem. If you have a hard time eating so little, or you only get to eat more when doing greats amount of exercise, then that's not so good.

2 - You hope you can raise it somewhat in perhaps a 3 month time reset, and start again with a more reasonable deficit that may allow for even some recovery then. You have had a long period with no results anyway while torturing your body more, what's 3 more months actually trying to help it heal?

For helping recover the metabolism, you need to stop the cardio except for that 30 min walking which is fine. Do you really need to improve or keep your body's efficiency still doing harder cardio?

You need to do some hard body weight exercises. Those hand-weights will quickly become too light if you can follow these suggestions.
You want to use the biggest muscles in compounds moves, meaning there are other muscles being used at the same time.
Can you get heavier dumbbells when the time comes? Can you get a pull-up bar for doorway, they have ones that wedge at top very well?
You can get some great bodyweight exercises for upper body for now with just that bar, and likely be just enough. Lower body will likely need more weight than you have available. Got 2 gal milk jugs to fill with water?

So the best order to work biggest muscles first, while alternating between upper and lower body to provide some relief. You want sets to be 3-4 in a row with 1-2 min rests, with reps to be 12-15, with almost bad form on rep 15 last set, perhaps not even making it there.
Squats (quads) - extra weight in hands if getting all the way down, or hanging on pole on your shoulders as normal.
Inverted row (upper back)
Straight-leg deadlifts (hamstrings) - jugs heavier than 5 lbs likely needed
Bench press (pecs)
1 legged calf raises (calves)
Pull-ups (lats) - as many as you can do, or negatives, which is just lowering yourself, chair to get up there
jack-knife (abs) - 20 reps is fine if you can do that many
Shoulder press (delts)

For form guidelines on those, pick the muscle, look under body-weight or dumbbell.
http://www.exrx.net/Lists/WtFemale.html

The goal here is to strengthen muscle, you may gain some, but very unlikely with suppressed metabolism. Body isn't going to feel the need to add something that takes energy to maintain, when it thinks it's not getting enough already. But you likely will get water weight gain as glucose is added which stores with water, and water retained for repair process.

So only valid weigh-in day now is morning after rest day eating normal sodium levels, not sore from last workout. Minimizes false weight gain/loss.

I'd suggest using the spreadsheet on my profile page, get your stats in except for the RMR, you aren't going to eat to suppressed level. Track your measurements on Progress tab.
Get your workout time in there that you can do, hopefully 3 times a week, with that walking you can do.
You'll be eating to the TDEE goal, not the TDEG because your aim first is recovery, not weight loss.

Suggest you increase your daily calories by 100 every 2 weeks, working your way up to TDEE from your current eating level.

69.4 kg starting

25 days later

71.7 kg, less 800 mL water is 0.8 kg, less meal 0.5 kg, is 69.4 kg

If you are going to use few data points because of short time span - they better be the best data points you can get.

Valid weigh-in time - morning after rest day eating normal sodium levels, not sore from last workout.

So you gained nothing and not even a total 28 day month yet.

To confirm - that estimated TDEE is NOT based on the RMR test, right?

You do NOT want to chase an already suppressed RMR further down. So confirm you have no RMR stat entered in to that field in the spreadsheet, especially since it wasn't RMR.

And you are doing some exercise now to include in the Activity Calculator? Seems like a low figure.

You should be willing to eat at TDEE and slightly over, not under. A goal is something to hit, not miss purposely. 50 over is better than 100 below.

If you start exercising more or different activity, you'll also need to adjust that figure. And near the end, you'll want to do a 250 test for 2 weeks. Eating 250 more daily for 2 weeks should only cause an increase in weight of 0.45 kg, that's all. If you were indeed eating at TDEE.

Great job making the adjustment, sounds like the body is too. Keep it up, and don't we so tied to the scale, though it is useful to have valid data points.

Yep, I halved my estimate of your food when I edited, but forgot to change the final figure. But really, unless you weighed it, we don't know.

So 1.5 kg in almost 4 complete weeks (tomorrow morning is 4 complete weeks, right, Jan 6?).
Does that mean your starting point was a valid weigh-in? Or was it morning after doing cardio exercise? Or even worse, later in the day after not eating or after doing some cardio?
Since you are basing so much on this change in a month, that starting point better be very valid.
Or all this math is useless.

Why do you not want to figure out your TDEE while doing resistance training - will you be doing it later?

also i want to ask if my TDEE could be 1200
should i eat 1600 and exercise to burn 400 cal ?
will my TDEE increase by this way ?

I'm really thankful to have someone like you to guide me and help me out