Bad service

I once had a 24 month contract with Telkom that I completed years ago. I discovered last year that they were still charging R49 to my account for a sim that doesn’t even work anymore. I called their client care and enquirer about this only to be told it was a month to month contract now. I asked that it be canceled and the agent said that I’d need to fill in a form and that she will send it to me. She didn’t send the form and they still devoted my account. I reversed the debit since 1)I asked to canceled and the agent did not fulfill her end of the agreement and 2) I couldn’t access neither the number nor the data that was apparently loaded. Now I’m being debit R250 each month resulting from the R49 reversal?! This ****************!