Vodacom overcharging with no support service and no follow up, worst service ever

Having the same issue now for approximately 6 months being overcharged by Vodacom, a deal done with CHATZ MOBILE in MAYVILLE Mall. Eventually when CHATZ stopped caring they made me complain to Vodacom directly. The result is that I have now been paying the incorrect amount on my RED BUSINESS contract. The service from VODACOM has been terrible Kele from the call center just dropped my call midway through explaining my issue. I had raised a call previously and attached supporting documents and it was simply ignored. EC-1ZAB-3VSY91 mailed from ***