Utterly Disgusted at the way Vodacom views what a Contract is!

I have had a Vodacom Contract for the longest time. Vodacom is getting disgusting. Firstly that 36 month contract period to make the Contract affordable and now they impose increases annually during the contractual period. How does one know if you can afford the contract after the Price Increase to start with and then how do you buy yourself out. I suppose it is in the T''s and C's. I am utterly disgusted at the Games you are playing Vodacom. A contract is a binding agreement for the duration surely the amount you ay for the contract must be binding from start to the end of the contract. No surprises. Trust this will not impair my Credit Record