Shocking service and promises not fullfilled

For nearly 2 months now I have been trying to resolve a contract/billing problem with my husbands contract. They are billing us incorrectly as to what he signed for ( for almost a year) and now the staff member who did the contract has been moved/suspended according to the manager there. Some customer actually said the only way to get anything sorted out with Vodacom is to go to the Consumer Council. Promises are made, however nothing is ever done and now the managers are avoiding us. How sad is it that even the Vodacom staff at head office and in other stores tell you the only way you will get it resolved it to go via social media...and that is what I am doing as I am so desperate. I believe the stores are franchises and I have tried to get the contact details of the owner but the staff just block you. It is a disgrace that big companies make it almost impossible for the ordinary man in the street to resolve something in a decent manner.