Disgraceful MTN service

<p>On taking out a contract with MTN I was told that it was a capped contract (meaning i wouldn't be able to use more than the amount I was given each month by MTN). Due to the incompetance of the staff at MTN they failed to put a limit onto my account which then in turn allowed me to go over my limit. On taking out this contract I agreed to aproximly R420 no more and no less. January of 2016 we recieved a bill the amounts were incorrect. MTN debited it off of my bank account, as soon as I saw how much came of (aproximtaly R3000 more than what should've been taken off) I immediately reversed the charges. My grandson and I went into MTN the following day to see what had happened. One of the staff there explained to us that it was a fault on their side. But they still expected us to pay the outstanding amount. My sim card was suspended and I was unable to make any use of the data or airtime that was being sent to this number for the whole period of the contract, I paid everything off in full and to my knowelege closed the contract. This morning I recieved a phone call and numerous messages from mtn saying I need to pay the outstanding amount. This is absolutley disgusting behaviour and I'd like some assistance in resolving this matter. I have sent proof of payment to mtn on multiple ocasions </p>