Contract breaker
As others have mentioned, a change in T&C effectively breaks the contract. Whilst they can have a clause saying we have the right to change conditions, which they can, if it isn't accepted by the customer then there is no contract anymore.
Most people don't understand contract law and just go with it. If you don't like it, cancel and go elsewhere. There can be no cancellation fee as this would relate the old (now broken) contract. You can't keep the bits you want and impose new conditions without agreement otherwise I'll show you how to become a gazzillionaire with a simple legal contract...!
Biting the hand that feeds IT
