Un Allocated Payment

This is unacceptable the serviced I have received from RCS Sanlam Moneysaver Credit Card. The keep changing the bank accounts and I ended up making a payment into a Sasfin Account only to find out that they have now moved to African Bank. I then lodged a quey regarding my payment and they asked for the proof which I supp****, and they still have not resolved the matter almost 3 weeks down the line. Every time time someone new contacts me with the same email address to supply documentation which I do, and they still have not posted my payment. This has also registered as a missed payment on my credit profile although I was Double deducted this past month. I requested to also update my information at the credit bureau as it will stay on my credit score for minimum 6 months. They still have not resolved my payment issue and they have not stopped responding to my mails after sending them all the necessary documents.