Debit order not Cancelled

I am hoping that writing a review on HelloPeter will get a response from Telkom.

I cancelled my telephone line as moved in September. Since then, the debit order has not been cancelled. All my efforts, numerous emails and phone calls, to contact Telkom to get any response has failed. Am I supposed to reverse the debit order every month at infinitum?

I guess it's the only way that Telkom can remain lucrative... just do not cancel the debit orders. In my opinion it is theft.