Cancellation of expired contract.

Some time after our data deal has expired, we decided to enter into a new contract with Telkom which was done by telephone. During the conversation we pointed out that we have this deal and that we want to cancel it because of the new contract. To our dismay we discovered that we were charged with both the new contract and the old (expired) contract. We contacted them to cancel the old, but we were informed that we have to fill in a form and send it back to them to cancel. I found that odd because we only needed a phone call to start a new contract but had to apply in writing to cancel an old expired contract. We did however fill in the cancellation form and malled to them only to find out that they gave us the wrong email address. I looked up the correct address and resubmit it on OCT. 23. After a automatic response we had no feedback and was billed again for November and December. After complaining to them on Dec.1 I got a response Dec. 12 telling us that we have to resubmit and send additional documents (not indicated on the cancellation form) before the cancellation will be processed. I honestly think this is just a dishonest delaying tactic way of *****ing our money.