Contract Problems with Vodacom

I have a dispute with Vodacom about my account which I do not seem able to solve, 0n the 25th of May 2020 because of endless problems to load data and free minutes on my phone I was advised to migrate to a top up package.with the assurance that no extra costs will be involved. When I got my t account I had to pay over R70 rand more plus calls which I did not make. I took it up with Vodacom and was assured that I will be migrated back to the previous package immediately. When I got my account I had to pay the higher amount. After endless trouble I was credited with R29. I refused to pay the higher amount plus the extra calls on my account. Vodacom wanted to send me an itemized bill which I will have to pay for refused and said if I receive the bill I will pay the costs of the itemized account if it is proved that I did make the calls. Vodacom refused this. I filed numerous complaints. I did receive a few sms's that somebody and names were mentioned would phone me and this never happened. I would only receive an sms that the matter has been attended to and the case is closed. My account is still the same and I can not get Vodacom to give me any explanation. I forgot to mention that my account was also credited with an amount of R75 for what I do not know. I am very unsatisfied with Vodacom and I have been a customer of them for many many years.