Vodacom BIlling

I am struggling to understand my bill with Vodacom. It changes every month and I have been sent from pillar to post trying to get answers. None of their consultants have been able to answer me let alone provide the same explanation. I am told about repo rates, tariff increases and vat (vat that was included in the quoted amount and thereafter the contract) is now excluded in invoices. no one knows what is going on and each consultant disagrees with the previous one and yet offers a completely different explanation. I have logged multiple calls, I am told I am being referred to the relevant department, then I receive an SMS saying my issue has been resolved. When I follow up, I do not get responses. I have been waiting since the 11 June 2023 for a call from two of the consultants who promised to get back to me. I was offered to reduce the benefits that come with the contract so as to maintain my bill. so in essence get less then the initial contract but pay the same amount. Even though the quote I received and accepted included VAT I am being charged VAT again. Vodacom has according to their consultant made unilateral changes to the contract.