Tariff increase

I can't believe how one-sided the contract is. If I try and change anything in that contract, it either costs me money or I'm tied in. Why can Vodacom change it? I can understand a change for new contracts but not an existing one. I have 3 contracts with Vodacom, all of which have incurred this price increase.<br> What kind of a contract only protects the provider and not the consumer. <br> They are resting on the fact that most of us can't afford fancy lawyers to fight this.<br> This is very unfair and very *********. Contracts are supposed to protect both parties.<br>