breach of contract

I signed my 24 month contract 4 months ago. Today I receive an email informing me, without my consent, that Vodacom is increasing my monthly agreed upon contract price? ?? This is not okay, not acceptable and needs to be stopped.<br> <br> If Vodacom wants to break their side of the contract I want to cancel the whole deal. Take your phone back. Tear up the papers which I signed and obviously means nothing to you.<br> <br> So there are 2 ways this can go.<br> 1. Do not increase my fees, leave it as we agreed on 4 months ago for 24 months.<br> <br> 2. Cancel my contract and take your phone back.<br> <br> I am disgusted.