failure to cancel contract

I am appalled at the poor service received from MTN. For a telecommunications company your internal and external communication has failed on every level. After receiving an SMS saying I need to submit in writing a request to cancel my contract I did so via email on 29/09/15. When no response was received I resent this email on 12/10/15 at 11:19 and 11:20. I received the first reply on 23/10/15 SEVENTEEN DAYS after my request which asked for the reason of cancellation. I again requested cancellation twice on 26/10/15. I then called in and was assured the cancellation would be processed and I would receive a confirmation SMS within 2days. I did not receive this and called again on 29/10/15 where Janet reported the waiting time is 2 to7days and the cancellation has been submitted. On the 5/11/15 I again called when i received no SMS and was again told it has been processed and I will receive an SMS soon. At all of these calls I asked if it would be cancelled from the end of October and I each time I was assured that it would be and I would not be liable for a November charge. When I called this morning again I was informed the contract is still not cancelled!!! I have had enough!!!