Bad faith contract dealings.

Created an account just to be able to post. I had an active contract with MTN which I had arranged to cancel and had been advised to pay a fee for cancelation. I had followed all their steps and paid their fees and assumed that my cancelation was processed. This month my account was once again debited and I have been informed that my contract is still active. I have spent over an hour on the phone today to attempt to get hold of MTN, spending most of it on hold, only to be informed that I am supposedly at fault as I had apparently not phoned to confirm the cancelation, even though I had already arranged it beforehand and even gone so far as to pay the cancelation in store to ensure that there was no confusion. Have been informed that I must now pay again to cancel the contract. Am very very unsatisfied and would have thought better of MTN.