Mileading Call Center contract upgrades

I am a vodacom business client who is highly disgusted and disappointed with the service recieved from Vodacom. Early in December I was called to do a telephoic upgrade from a vodacom call center. The calls might I add was recorded. I agreed and took out a 24month contract for a galaxy note 20. Just before my handset was delivered I received a message that I have been upgraded with a "36" Month contract. I called into the call center approximately 10 times to correct this and everytime I speak to someone they say they will call me back but never do. Today someone called me again for an upgrade but could not proceed as I have already been upgraded. I dont even have the new phone. I never accepted the delivery from the courier company. And guess what. Th lady said she would call me back in 10 minutes after chatting to her supervisor. She is still calling me back. I even spoke to the supervisor at one point who also promised to call me back. Please Please do not trust a telephonic upgrade by any vodacom call center. My upgrade was due in November 2020. Its almost the end of January 2021 and I still can't upgrade because according to vodacom I have already upgraded. I canceled and never recieved the phone. A simple internal problem that vodacom can't seem to solve. The worst service ever. A few years ago I handed in a faulty phone for repairs to vodacom an guess what I am still awaiting my phone. I never ever got it back. I am now considering to rather port to MTN or Cell C