Upgrade with MTN

Ive been trying to upgrade for the past 4 to 5 months and MTN is giving me the run around. The one reason is that my number is on the old system (as if i chose to be in a certain system) of which i dont understand why am i not being moved to a new system if thats what is supposed to happen. Another reason is that the phone that has been approved will be delivered upon arrival. On the 23rd November i spoke to Gosego who promised to get someone to assist and he never did. Today on the 2nd December i spoke to Boitumelo from the call centre retention and she also promised to assist. She promised that a supervisor will call me to complete the upgrade of which i doubt ill get the call because thats all ive been hearing from MTN. Please be informed that im very disappointed and want to know if MNT will be able to assist or not so that i can move on.