BAD SERVICE FROM DISCOVERY BANK

On 9 August, I received a statement from Discovery Bank advising that I owe R297.91 as well as instructions on how to change my account number from Discovery Card to Discovery Bank. On 31 August, I paid R1000.00. In September I received messages from Discovery Bank threatening that they would report me to the credit buraeu. I contacted them and sent them proof of payment. I never heard from them so called again. They again promised they would sort it out. I have spoken to three people since then and am still waiting for a call to resolve the issue. I have mailed them at least 10 times and get mails back thanking me for the mail and advising they will contact me. To date, they have not allocated my payment to my account three months later.