Mtn is useless

I inquired about an upgrade about a month ago at MTN direct. I was eligible to upgrade. After choosing my phone sony experia xz premium the consultant Thory confirmed they had no stock on this device. I told her that I will wait for the phone until they get stock. For three weeks she phoned me religiously with regular updates. Only person at MTN that is service orientated... Last week she gave me the good news that the phone eventually arrived and we can process the upgrade. She advised that it will be delivered in 3-7 days. Yesterday was day seven. I started following up on the device since Monday ( day 3) I have been pushed from pillar to post to try find out eta on the device. I also sent a mail to support on Wednesday with no reply as yet..Yesterday I was told it was a system error and they do not have stock but dsv already had a tracking number ( dsv said there was no info loaded on this tracking number)? I have spent +/- 6 hours this week holding to eventually find this out. When they told me that there is no stock yesterday I spent 1h18 min holding to cancel the upgrade.. Upon checking today the upgrade was never cancelled. I can not contact retentions now because they are all in a meeting until 15h00. I was hoping to find a mtn store that has stock to do the upgrade this weekend but yes they are in a meeting. I cant do anything. This is really pathetic. I rated mtn 1 out of 5 but this is too high.Unfortunately Hello Peter does not have a minus scale as it would have been a minus rating for sure.