Unauthorised upgrades

I’m very angry with the service at Vodacom. They literally upgraded 3 of my contracts without my permission. Some lady working there at Vodacom gave me false information regarding some promotion going on. After telling her multiple times that I do not want an upgrade she assured me that my contracts will not be upgraded only to find 3days later that all my contracts have been upgraded and now when I’m trying to reverse the upgrades it is taking forever. My query was closed today but the issue is not resolved. At this point I’m just tempted to cancel all the contracts because this is happening for second time where contracts get upgraded with false information