Unpaid refund

On the 28th of September 2015, I requested for contract and service cancellation for the three products that I had with Telkom for the past two years. Despite the timely request for cancellation, Telkom did not effect the termination of the contract and went on to bill me for two consecutive months. The amount that they deducted from my account is about R1000.00. I phoned several times and spoke to different consultants and I was promised that the refund would be effected soon, but that did not happen. I went on to speak with different managers who promised the same, but up to now, I am yet to receive my refund. As a client, I feel as if I am being punished for terminating a contract. If my case had been handled professionally, I should have received my refund a long time ago.