Bad service from MTN SA

The way I hate Mtn now I do not know how to express my feelings. I bought my contract phone online and it was delivered three weeks back with the simcard. I was sent an email from mtn no reply mail providing my new cellphone number. I called mtn via 135 and they transferred me to billing, billing told me to call *** and they also told me to call the 087 number that deals with online contracts or complaints. I've sent two emails to complaints department with no luck. All I am asking for is Hello Peter to help me return this phone and have mtn to cancel my contract as I will be billed the normal price while no one wants to take responsibility and help me. I think all MTN Managers died long time ago as they've been escalating my matter with no one helping me. My number is *** Email: ***