Pathetic Service from Pathetic Agents and Managers

I've been struggling to upgrade my contract with MTN for the last 2-3 months. Everytime they process the upgrade, it just sits in their system and does not get finalised even after telling me it's approved. Most recently, they finally upgraded my contract about a month ago but I was not happy with the plan. So I called the next day and cancelled it which went through fine. I then asked them to process a new upgrade with a cheaper option and that has been a nightmare. They keep telling me that it is gone to the vetting team to vet increase my credit line by R1. This has been going back and forth for the last month and noone provides feedback. I don't understand how they can approve a higher contract but the lower one needs approval and take over a month. I have most recently spoken to lungelo and his manager prishendran and still no satisfactory outcome. They say I must wait 7-14 days. It seems like MTN does not want my business after being with them on contract since 2017.