PLEASE CANCEL MY CONTRACT

I have written 2 emails to MTN to request that my contract with them be cancelled as it is long past its renewal date and I have decided not to renew it. I now wish to be on pay as you go.<br> They do not answer their phones - they answer the phone and keep you waiting for 3 minutes....to give you the impression that they will answer, and then the line cuts. This has been the case for over a month now. I drove all the way to their in Fairlands but they will not let me through the gates. So tell me - HOW ELSE AM I SUPPOSED TO GET THROUGH TO MTN?? But they are very prompt to send me my monthly bill.<br> please cancel my contract with immediate effect!!!!