Contradicting information

I paid my African Bank credit card in full last month, with the view that I will be able to use the card again. I went to the ATM about a week after I made payment, only to discover that my card is blocked. When I called the call centre, I was advised that my card account is closed. This upset me, because I never asked for it to be closed. A week ago, I get an sms from African Bank stating that I have a credit balance on my account, and I need to e-mail them to refund it to me...How is this possible if the account is closed?? It seems that African Bank employees aren't sure what they're doing. Please refund the amount I over paid with, or uplift the hold off my account for me to use my card again. I am out of pocket with a few thousand rand and I need my funds urgently.