MTN - WORSE CELLULAR PROVIDER

During April i received an exorbitant account from MTN. I had never exceeded an amount of R200. This particular debit was for over R1200. I returned the debit order and logged a complaint, I explained to the service provider that this device was not in use most days and the period I was charged for I was out of the country and this device remained off in SA, furthermore the itemised billing did not correlate to the charges. Naturally MTN was of no assistance-I send various emails trying to resolve this matter. I then received correspondence enclosing a statement reflecting a NIL amount due. I assumed the issue was resolved, only to recently discover I was handed over to their collectors and listed on ITC-no prior notice was ever furnished on me. They have been the worse cellular provider I have ever dealt with - including in store staff - whom generally don't know how to assist you. And the worse is they refuse to cancel this contract - even though its term has come to an end.