Telkom cancellation a sham!

If i give it a lower star I would. I made the mistake 2 years ago of entering into mobile contract with Telkom because the rates seemed great. This was with the intention to port my number to their network. I soon learned that network at home (****arney) and at work (Midrand) was terrible. I decided to just stick with my network, use the phone and bide my time till my contract was up. January this year, i fill in their cancellation form and send it through to them. My contract was due to end mid march. In March they deduct my account. This is after calls from agents trying to keep me on their network, and my refusal. So they were aware of my cancellation. I call them to query this, and they tell me the details wasn't captured, but they are on it. And I receive email confirmation that my contract is now cancelled. But what happens now in April, another deduction and invoice via email. I reply with the email of them confirming they have deducted my email again- but now my emails to ********** are bouncing back. I check on facebook, and other people have the same issue. This is abuse of power by Telkom- do yourself a favour and don't even dare enter into the contract.