MTN BILLING A PAY AS YOU GO SIM CARD!!!!!

I waited the two years to convert my MTN contract to Pay as you go. I phoned the call center 3 times, to inform them that I will be converting to pay as you go. on the 9th of March 2016 was the last day of my contract, which was the 2nd time that I have called and the call center informed me that I need to contact them the following day. on the 10th of March I phoned again, and the agent informed me that it will take from 24 -72 hours for the process to be completed. I have moved to another supplier after this time as I was not getting the service from MTN and was tiered of being incorrectly debited (which I also complained about but nothing was done)<br> this morning I received an SMS from my bank to say that I have AGAIN been debited incorrectly and that I was being debited by MTN!! which by now should have been a Pay as you go contact and I was not suppose to be debited on. Been trying to call the Call center the whole morning, but with no surprise there is no answer, I have now been on hold listening to the horrid music for 20 mins!!!!! MTN should close there door as there service is terrible! they are the worse service provider I have every used.