24 mont contract price hike

As if it is not enough that we pay the most of any country in the world for mobile telephone calls ect. Yesterday I receive emails stating my monthly subscription to rise in price i singed a contract at X price and that is what i pay now they just say that it is in the contract that they may hike the price and that i must now just pay more every month just shows that the new consumer act don't actually work day light robery if you ask me get your act together Vodacom