Fraudulent Upgrades done by Vodacom - Consumer Complaint for Vodacom - Head Office

Two of my lines were upgraded without my consent. Have received bills for Aug and Sept. Have asked for the upgrades to be reversed, lines to be cancelled and the much higher monthly amounts to be credited to no avail. Call after call, numerous emails, just getting shifted from one department to the next without any help. I have three reference numbers already and getting sms feedback that it was resolved, but my account remains the same and both lines are still active. Is there any other way to resolve, as customer service is useless!!