Vodacom worst service and biggest cons ever

I have complained three times about Vodacom from November and we are now nearing end December and still no response . clearly service means nothing we are just a number to Vodacom .I mean how can Vodacom sign u up for a contract let's say for 200 a month fixes contract on top up , so now how can Vodacom give u extra data and airtime and charge u. Even their vat calculation is incorrect how does this work ... Where's top management for vodacom