STILL DEBITING MY ACCOUNT AFTER CONTRACT CANCELLED

After numerous calls to Telkom Mobile to cancel my data contract which was nearing it's end, as well as a confirmation call from them to say that my contract is now cancelled, they continued to debit my account... not just the old amount of R287.50 but R419.12 in September and R407.50 in October. When confronted, the service center operator confirmed that indeed there was a note on their system that said \28/08/2015 client requested cancellation". Now I get told that the account has not been cancelled as I was supposed to have signed some document to acknowledge cancellation (which nobody mentioned before). I find it completely unnecessary and unprofessional of them. Now I have to basically beg to get my money back!!! I will never take out another Telkom contract nor will I recommend it to anyone. In fact I will make sure everyone knows not to trust them!!"""