I took out a consolidation loan with fnb on17thApril,they wer going to settle my other loans&I pay 1loan with them

I took out a consolidation loan with fnb on17thApril,they wer going to settle my other loans&I pay 1loan with them.problems that came with the whole transaction,fnb paid less to African bank,there was balance that I had to pay to African bank&my account was debited on the 30thApr,when I asked was told that the amount were verified, which clearly wasnt the case.I gave payday during the appl but the first debit order date was showing 6May,I queried this on the 23April&I was told that the date will be changed to align with my payday,the 20.I noticed on my account that they still tried to debit on the 6th even after the date was changed to 20.Now today there was funds that were paid into my bank account and fnb took funds,why? This whole process was a set back bcoz it didn't serve the purpose, now I'm in a worse financial situation bcoz of this.My profile is showing that I'm in arreas.was expected to pay the consolidation loan&still settle the outstanding balance with African within 2 weeks,how