Disguisting service by MTN over charging me on account

<p>I had taken a contract with MTN about two years ago. That contract was due for upgrade in May 2016... I no longer wanted a contract with MTN so i calles their MTN SP customer line to cancel the contract.. Don't remember the exact dates but i called in after the 1Maywhich is isually) when their payment goes off on my account) that May would be the laat debit and contract will be cancelled .. Reference number for this is ; ********** 22.. 15 June i got an sms notification from my bank that a debit from MTN had gone off.. Completely shocked i called them again reference: ********** 91 spoke to Lucky who said my account was behind by a month that is why the payment went off, i again didnt understand this as the 24 months had already lapsed .. He assured me again that it was the last payment.. Well here we are a month later and I received another notification that MTN AGAIN DEBITED from my account.. I have been sold lies once again, CAN SOMEONE MAKE ME COMPREHEND WHY AM I PAYING FOR A PHONE I HAVE "FINISHED PAYING OFF"?? The number has even been changed to prepaid , its not like i have money to JUST be giving away to MTN.. I demand to be refunded on all payments that have gone off after my contracted had been treminated</p>