MTN/Rewardsco online upgrade

I have app**** for an online MTN upgrade which was approved. This was done on the 26th November 2020, and have upto now 24th December 2020 had no communication for any agent, no delivery and no upgrade. After 5 calls th MTN call centre with no resolution, I was given rewardsco telephone number, but cannot for the life of me get through to.

Disgusting service from both MTN and Rewardsco. I am ready to terminate my MTN contract which has been active since the '90s!!!!!