******** debt order going off

I have taken out a personal loan with Nedbank. Yes I miss three months or four. When I lost my Job now that I am working I started paying every month but to my surprise Nedbank deducts a installment which I didn't agree upon. I was advice it would be R1114 every month for the past two months they deducted more then that I thought they would stop but on the 25th of August 2023 Nedbank has debited R2000 a few minutes after that another R1000 why???? How am I supposed to feed my kids? I am going to take this further. I want my R2000k