Vodacom charges

I have had an ongoing dispute with Vodacom since 29 December 2017 which to their point of view, is now closed. But, my line is cut, have not had one call from Vodacom in two months to discuss my account. In November 2017, I updated my contract. Was given a new iPhone, used my Vodacom data ****le to do the transfer, only to be charged R 17'000 for 7GB of data transfer on my main contract! They passed on a "goodwill" credit of R 13'000 yet whenever im about to run out of data, I buy their package on the app of 10GB of R 599! Yet they dont look at the reason why i was charged so much, just simply, pay up bud! I am now sick and tired of their complete lack of service and respect to make one phone call to discuss my concerns. Im still without service after two months! But i bet they will charge me for the two months as being in arrears even though the lie is cut! What do i do from here? Ive been to my local Vodacom Longbeach store in Noordhoek, even they are stumped as to the lack of process. I pay R 2000 per month for my Red VIP Classic contract, you'd expect some sort of service, its no small amount of money each month!