SHOCKING SERVICE!!!! TCF non-existent!

I recently did an upgrade with MTN: after the initial inconvenience of this being handled by one of their outsourced companies and it taking over a month to sort out, I was eventually contacted by Letta Selepe in their retentions department. It was clearly articulated at first contact that this was a business phone and as such, for business purposes. On receipt of the invoice it is clearly evident that this is a finance contract where I am paying for the phone and the Samsung Watch (which I was informed was free with the upgrade). Since October of last year I have been trying to sort this out. I was escalated to Letta's supervisor who eventually simply started to ignore me and my requests and then escalated to Kabelo Mohlamme who also has been of no help. The costs accumulating on this account are insane and NO ONE will assist. There are items on the invoice to which I never agreed and when I spoke with one of their consultants yesterday she said "But it is less that you agreed to so what is the problem?". With all these people working from home they can elect to ignore your emails with no accountability. There is no one at the Fairlands branch that I am able to go in and see and I simply get fobbed off from one *********** Manger to the next. I logged a complaint on their website and was informed on Wednesday that I would have contact within 8 hours. It is now Friday with zero response from MTN. I log tickets with them which are simply closed without resolution. The only person that this is affecting is myself, both with an inefficient package and insane costs being accumulated monthly. MTN's solution: they simply suspend my services! ZERO ACCOUNTABILITY on their part!