Bad Customer Experience from African Bank

I called African Bank Customer Service on the 10th of January 2023 to lay a complaint, spoke to their agent who then promised me that my case will be investigated and I must allow them 7 business days for the outcome. They sent me the reference *** to acknowledge my complaint. 7 business days has passed and still no outcome on the complaint raised. I am not happy with their service and for the fact that they put incorrect information on all credit bureau about the credit card monthly instalment. The agent confirmed telephonically that my monthly instalment due is R100 , their app and the statement I received from them stated amount due is R100 as montly instalment however on all the credit bureau reports (EXPERIAN/COMPUSCAN/TRANSUNION/XDS/VERICRED) the account information is reflecting an incorrect monthly instalment amount of R3415. How possible is that? I have never used the full credit limit. The credit card is on a credit/positive balance and on the statement date my credit card was still on a positive balance, even now. Please correct this information urgently and revert back soonest with outcome.