Telkom - Billed for suspended account after Cancellation Fails

How can I be billed on a line that is suspended??? I stopped using the phone line a few months back, phoned telkom and requested it to be canceled. I received no accounts via email, and then suddenly receive an account for R2200, which includes R615 for a line transfer that never happened. I can now not apply for the line to be canceled and thus each month R200 is added for a line that I do not use.