Poor service

I upgraded on 15 Aug 2019 my MTN subscription. After 5 days, I had to phone to find out where my phone is. Was told I must wait again. After another 5 days, to be told that "the system" doesn't want to finalize the upgrade. They will put a cancelation through and that it will take 72 hours. I can then go upgrade at a MTN store. On the 1st Hellopeter complain, I received a mail for the cutomer care department to say they will look into it. I didn't receive a call or anything after that. It's now 18 days after I upgraded and I still don't have a phone. MTN, this is not how you treat your customers. I want to be phoned tomorrow and told how MTN will fix this problem.