Not upfront, misleading info to get your business

I have a contract that Vodacom took 4 months to get right as agreed originally. Although the bottom line price was agreed upon, they upped the data prices across the board which affects my bottom line. How can that be allowed when the contract price was agreed upon for 24months???!!!! All they say is, tough mate, thats how we do things! Surely after 22yrs with Vodacom one would think there would be some customer service - but proof again, all about the money, not he consumer....sad world.....