MTN Meyerton no service

I signed up for a new contract beginning of september 2022 and since i received the phone there was a problem with the phone. The IMEI does not register on the network, I cannot hear when I receive a call, nor when I make a call. I went back to MTN Meyerton talking to Juanita regarding the problems more than once. Eventually I insisted they send the phone back, which we did in September 2022. Now this can take 6 to 8 weeks which I think is ridiculous for a new phone that is not working properly. Up to now I still dont have a new phone, my phone or any reason except that there is nothing wrong with my phone. When I phoned Juanita on monday she said she will try again emailing some manager to help her sort this out. There is just no priority in my complain and repair or replacement and is way over the 8 weeks. I had to be patient for the 8 weeks which I had done, but there is just no reasonalbe response. I asked Juanita on monday to sort this out that I can get a new phone/different contract by Wednesday with no results. I have to pay my UPGRADED contract, but cant even get service from MTN nor any feedback if I dont phone Meyerton branch myself. Today I phoned 8 times already and the phone just dont get answered. I think this is very unfair towards a client and not paying my contract is not an option. I need to have this sorted out by tomorrow as I requested from Juanita.