Losing weight (fat) the struggle is real

Hi I'm Shivneel . So I Became obese (142 kgs ) . I lost heaps came down to 87 kgs in a year ..now I'm still doing gym and cardio but have started to gain weight .I'm like 90 kgs now ..I need to lose 6 more kg to become fit again .i don't know how to .I've been stuck in this weight range for a month now. It's really frustrating ... Can someone tell me what to do .im running outa ideas