Bad service - cancellation of contract

I cancelled my contract on the 25th of September 2015 at Telkom Direct in Cape Town, only to find out in November that the contract was never cancelled. To make matters worse Telkom has been billing me on a month to month rate that is more than the contract rate. I spoke to customer care again today to be told that my contract is still active and there's nothing they can do as they did not receive documents to cancel. Instead of assisting me the agents put the blame on me for not forwarding documents to prove cancellation. If the person who was handling my cancellation on the 25th of September did not forward documents then why am I made to pay for something that I wanted cancelled. I wish i had nothing to do with company which i held at high regard once upon a time!<br>