Absurd cancellation fee after price incease

Dear Vodacom, I see that you changed my contract price which I will accept on condition that the contract cancellation fee is not as absurd as what you are currently asking. According to the CPA you are entitled to change the contract price if I have the right to cancel the contract. But you are violating my cancellation right by asking me an absurd cancellation penalty which would make no financial sense to do and it would then be better to just keep the contract which I don't want to do. I've had my contract for 7 months now and the handset value back then was about R7500. Now Vodacom wants to charge me about R10,000 to cancel my contract as they expect me to pay 75% of my future subscription fees which does not make any sense as I won't receive any of those services. Please note that I will lay a formal complaint against Vodacom and its directors if I have to pay the penalty fee of future subscription fees. I'm only willing to pay the remaining balance of the handset.