Give back my money African Bank

I would like you all to know about the terrible service I have received and am still receiving from African Bank. I made a payment of R2175.00 + R2175.00 to unisa on the 25/06/2019. Unisa having issued me with receipts both payments. I thereafter received my unisa statement saying I owe an amount before registration can close. I then went back to unisa to query the amount and they informed me that only an amount of R2175 was paid. African Bank statements reflect payment. Of both payments of R2175.00. I then visited a branch and they phoned the credit card dept. I spoke to a consultant who told me she would get her manager to speed things up. I waited almost 2weeks with no phone call from any manager. I then went to another branch and the consultant told me to get a statement from unisa. After doing this I went back to the branch and the consultant phoned the card dept and I spoke to a Consultant named Tabile. She assured me she would fast track the whole process. I told her registration closes at unisa on the 31st and I simply need them to reverse one payment so that I can withdraw the cash and pay Unisa. She assured me that her manager will call today. (I'm still waiting.) I then called the credit card dept on my own and asked to speak to Tabile. The consultant named bataletso that Tabile wasn't in. I then went on to tell this consultant the whole story. She then assured me that her manager will call me back. I'm still waiting. They have not given me any reference no. I asked and she said it is sent to us via SMS. African Bank has shown no customer relations to help me get my money back. Its money that I'm paying interest on.