Telkom simple dont care

I cancelled my Telkom line in May 2015 and Telkom continued to bill me until September. I have finally managed to stop Telkom from *****ing my hard earned money, by having to cancel my debit orders, however, after numerous phone calls and empty promises from Telkom, Telkom simply does not care about refunding the money they owe me. I have used all other alternatives, I am now going to start legal action if this is not sorted out by day's end of 30/09/2015