Poor service from MTN

MTN Corporate contacted me on black friday to upgrade my existing contract. Ever since I have not been able to get hold of anyone to assist. I phone MTN Corp on ********** 325 - been trying for over a week. When a consultant eventually answers - they just put the phone down. I managed to get someone to help and they said I had to phone CCF Direct outsourcing and gave me a number ***- this subsequently belongs to Altech netstar. I really don't understand how MTN can frustrate clients like this. It is so annoying. Can someone please phone me to see where my upgrade has gone to??? Phone me on ********** 389 but the upgrade is on ********** 375 Is this a ****. As soon as I get hold of someone and tell them it was an upgrade - they put the phone down???