Incorrect contract

I have been struggling to get help from Vodcom since March 2024. I spend over 20 minutes every time i get through the call center however my issue never gets to be resolved. They keep on saying that they will get back to me but never do I agreed on a contract of R1199 unlimited minutes. They decided to put me on a contract of R2439 unlimited minutes with 22GB which i did not ask for. The one agent said the only solution is to cancel but i will have to encur the cost, even through the mistake was done from their side. I would like for vodacom to either put me on the R1199 plan and refund me the money that they have been deducting. Or they must cancel my contract with Vodacom. I’ll shop elsewhere. They have email addresses for addressing issues however when you email they say the service is replaced by Tobi. Tobi then says he can’t assist with my specific issue. I don’t know what to do.