MTN refuse to acknowlege that I don't want to renew contract

<p>I've had an MTN contract for 24 Months.</p> <p> </p> <p>Recently started getting messagesr regarding renewal.</p> <p> </p> <p>I went into the nearest store to inform the I DO NOT want to renew. They tell me I can't do that in store. You have to phone. Why can't they phone???</p> <p> </p> <p>So I phone their number and hold for 20 minutes. I was unable to hold further.</p> <p> </p> <p>Now I'm out of the country for work and send them an email explaining I would not want to renew. They come back and say I must phone. I explain my situation to find a solution and my emailed was not rep**** to since Tuesday (13/06/2017)</p>