Contract cancelling nightmare

I have been a loyal MTN customer for 4 years and never had an issue until now. I tried to cancel my contract, which expired this month. Firstly, we had to phone three different numbers because each time we were told it was the incorrect number. After speaking to someone, we were told the contract would be canceled from the 1st of September. The 1st of September rolled around and I still got my normal data allowance and the account was debited the FULL amount (Technically the handset is paid off after 24 months, so we should only be billed for the allowed data and minutes in the package). After this, we phoned again to try and cancel the contract and we were told that someone would phone us back in 72 hours to confirm the cancellation. That was 2 weeks ago and we have yet to receive a phone call. After feeling fed up, I VERY RELUCTANTLY upgraded my contract, only because I was bul**** into it by MTN refusing to cancel my contract.

I am seriously disappointed in the customer service from MTN. The sales department is very quick to phone me and email me with new upgrade offers, but when I really need and ask for help in canceling an EXPIRED contract, no one could care to assist me.