Assistance with refund

I have been a Standard Bank client for 15 years. On the 11th of April I paid R900.00 over to a tax service provider but realized 2 minutes after concluding the transaction that I used the correct account number but paid the money to wrong bank being ABSA and not FNB. I contacted Standard Bank immediately to request that a reversal be done. Standard Bank informed me that I had to wait 10 business days for feedback. Since then, 11 April I have had no feedback from Standard Bank. I contacted Standard Bank Castle Walk this morning only to find out that they don't refund Credit Card transactions and that my R900.00 was as good as gone. I informed Standard Bank immediately after the transaction was concluded yet my money could not be refunded. I can understand if I let time pass by but I let Standard Bank know immediately. This is ********, I want my money bank!!!!!