Very bad service

There is noting i regret taking a credit facility with African bank your service is so bad the last week of January I calles in to ask why are my banking fees R500 and I only contribute R120 to the actual amount I get that im in errors and there is fees but how come from a debit order of R660 I only pay R120 and rest gos to banking fees it means it will take me years to pay up. I asked this matter to escalated and advised I changes my numbers and gave the correct ones because I dont have the time to go update at the branch I was told it will take 48 hours for a response its is the second week of Feb and still no response. Your service is bad to the core I dont know how many times iv written a review about your company can this matter be sorted I want answers why am I charged so much on the banking fees my Ref is *** and please reach out on the numbers made on the notes i want answers and invest in your service.