Customer exploitation

I recently made an arrangement with African Bank for a loan that was taken, the arrangement was R250.00. When the arrangement was made it was not made to my knowledge that I need to rearrange everyone month. For the past 6 months a debit order of the arranged amount has been made. I am currently unemployed however I still ensure to make payment of R250.00. On the 15th of Feb I received a call which I answered requested for an arrangement, informed the lady that I'm unemployed and the arranged amount should be the same. During the afternoon I get an sms saying I agreed to pay R10500.00 which to my surprise was never agreed about(Please listen to voice recordings) Now it's 7pm after speaking to 5 consultants to get this sorted out, and constant calling wasting my airtime, I get no joy, yet I am being exploited by African Bank to pay something I did not agree to. Still waiting for the supervisor Nthanthi to call me back but it seems like she's really busy.