Disgusting Customer Service

I upgraded my contract on the 1st of February 2024 at MTN The Glen. They did not have stock of the phone I wanted and arranged it with the Mall of the South. My upgrade was only approved the Monday afternoon and I was without a phone for 2 days due to theft. The consultant Nonhlanhla advised me that I have to pay an early upgrade fee, which includes my old device. I paid the fee instore and a week later I was slapped with a ridiculous bill for the end of February and the fee I paid was not deducted. I called your call center and was referred back to the store where I did the upgrade. The store Manager never bothered calling me back. I interacted with the consultant once when I logged a complaint. Thereafter I have to follow up every time with no feedback from the store or the billing department. It is a whole month later and my billing was still not rectified. I receive SMS'S every time someone access's my profile but no feedback on my incorrect billing. Your customer service is pathetic. FIX MY BILLING PLEASE. I'm now stuck with you for another three years unfortunately. I had to collect my new device from another Mall as I was told by the consultant that they cannot arrange to have it delivered to their store. I have never experienced such horrific service and inconvenience when doing an upgrade.