African bank is ****ing me

I would like to share my disappointment about how African bank is treating me. I settled my personal loan last year July. They even gave a change of about R200. I have been monitoring my app to check balances. They have not been sending bank statements.

Then boom in May 2022 my account is arrears With R18000 balance. Then on the other hand R4000 I owe.

When I call them . No one explain what's happening.

I was in the branch at Sam Ntuli Mall . They showed on the system that the settlement amount has paid.

But when I call the client service they told me that I now owe them R20 000. Can someone help before I loose mind. This affects my credit score. I am so furious. Can someone advise.