Vodacom need urgently to solve no service but taking payment eAch month

I have a phone on contact. I got the iPhone 10 upgrading my contact to have more data. For the last 3months I have been to a few different stores because suddenly my phone would not be able to take or make calls, I could not use my data it was a useless phone that would only be able to use watzapp and internet when on WiFi, everyone consultant has said it is not the phone but the sim and that I must keep coming in to the shop to have the sim reset. And that even if I had a sim swop that it is not guaranteed to solve the problem, and that vodacom is aware of the problem and working on fixing it. And that they have had a few people with different phone brands with the same problem. My problem is I am paying for a service of which I can not use, I can not make emergency calls if needed, I can’t use maps to drive to a location I don’t know etc. I hope that someone in vodacom that can actually solve this problem for me will contact me because otherwise I find no point in keeping any of our contacts with this company and will need to find a company where I can actually phone with the airtime and data that I have paid for!!!! No point giving my cell phone number I have given my Partners number!