Cannot Cancel Contract

I am trying to cancel my MTN contract but can't get MTN to service my request. <br> <br> The MTN shops cannot help me with this - I was told in store to phone 808. I have not been able to get hold of an operator on 808 for weeks after countless calls. I therefore decided to email the Customer Care Centre with my request, as I cannot sit around holding on the phone all day for an operator. Despite the MTN website informing that emails would be responded to within (an estimated) 3-5 business days, I have yet to receive an acknowledgement to my email sent on 2015/04/23.<br> <br> I simply want my contract cancelled so that I can move to prepaid, and I cannot understand why this is so difficult to achieve.<br>