Feedback Required on Cancellation request

Please can I request for assistance with regards to cancelling my contract. I Have tried to do so using numerous platforms such as e-mail (which I have received no response to), the call center (the longest that the telephone was ringing was 10 minutes and it cut off by itself without anyone answering), the request option when I sign onto my account online (sent a couple of messages over there). The problem is that the contract states that I have to notify you to cancel my contract after the original contract end date (24 July 2015) or else it will be continued on a month to month basis, yet I have been trying to do so for over a month now but with no success. So what's next, MTN will be debiting my account without my permission even after I have clearly stated a number of times that I would like my contract to be cancelled. Please can someone resolve this issue.<br> <br> Thank you.