Cancellation request not honoured

Long story short: request to cancel service from June last year to now still not cancelled. Spoke with various call centre staff from June. Request faxed and then emailed in October along with letter on an 8ta form, sent to me by the call centre. Resent on 1/12/2015. Still not cancelled. I have subsequently cancelled the debit order and lo and behold I am now in arrears, because Telkom did not cancel the service. I have resent email again on 29/01/2015 and dropped it off at Telkom potchefstroom. I have called and been told with the 30 day notice it will be cancelled on 29/02!!!!!! REALLY is 4 months notice not sufficient!! I have documents and emails to back my complaint up. I am not happy to pay for a service that Telkom cannot provide where I live. It is ludicrous that I am expected to pay for a service that I have tried repeatedly to cancel, a service that cannot be provided in Parys, as there is no coverage. PLEASE sort the matter out!!