requesting a refund

I am extremely frustrated with the level of service I am receiving from Telkom regarding a refund I requested. I had overpaid my account; instead of paying R5005.05, I paid R51003.00. I sent an email on May 19th requesting a refund, but I still haven't received my funds. I attached all necessary documents to my email, including proof of payment and the invoice showing the correct amount that was meant to be paid. However, nothing has been done. I urgently need this issue to be resolved. this payment was for my company, Phek Engineering & Supply,my telkom ***