Bank didn't close credit card account on request.

I went to Capitec Bank on the 27th of March and asked them to close my credit card since I have paid the outstanding balance. I was asked to paid about three hundred and something rands to settle and close account. Two days later I see on my app account still shows on my app so I decide to test if is it still working and transfer 5K to savings and back to credit again. Two days later I recieve charges on my balance and when I go to enquire at the branch I was told to pay another settlement amount if I want to close as my account didn't close back then. This is the reason why people end up in debt, banks not allowing people to close account.