Very poor service delivery from mtn

I have cancelled my contract yesterday I do hope that the mtn agents can handle that job as they could not handle an upgrade done on 17 July after spending an hour on the phone yesterday with mtn agents without getting an answer as to where my phone is. I have reported mtn on hellopeter on the 28 Aug promised that same day on hellopeter that my case will receive urgent attention I still did not receive even a phone call from mtn! After all these years as a mtn customer with an business account I thought mtn would at least appreciate the business. I cant believe that mtn and customer service in SA has come to this!!!!!