Price plan increase

I have 3x personal contracts with Vodacom which I've recently upgraded and extended for a further 24 months. I've received communication from Vodacom that my current price plan will increase as of 1 May 2015. <br> <br> I've read through my contracts that I've signed with Vodacom and nowhere does it specify that the monthly charges may or will be increased within the 24 month contract period.<br> <br> Regulation 5(1)(a) of the CPA specifies that if a consumer agrees to a fixed term contract over the regulated 24 month period, such a contract should only be entered into if it will be of a financial advantage to consumer. The supplier MUS T demonstrate such an advantage to the consumer.<br> <br> I have sent a query to [Email Removed] with no response to date. I would appreciate your feedback and advise.<br>