CANCELLATION OF CONTRACT - TERRIBLE ASSISTANCE

I am trying since July 2015 to cancel my contract with MTN. This is the second time that I report it on Hello Peter. After the previous reporting, a person from MTN phoned to ask me to email proof of payment for the early cancelation fee, AGAIN (this is now the 4th person I emailed it to since July). I phoned MTN AGAIN last week and the SUPERVISOR DID GET THE EMAIL BUT DIDN'T FORWARD IT TO THE RELEVANT PERSON. How can you be a supervisor and not lead by example???? This is truly frustrating as I have emailed and phoned and logged complaints but still my contract isn't cancelled. The debit order is going off every month but I don't use the ****le anymore. PLEASE PLEASE PLEASE CAN MTN RESOLVE THIS MATTER ASAP. This is realy laughable... Poor Service delivery and just promises!!!!