Abuse of Consumer Right

I've been on a Vodacom contract continuously since 2003 and the pricing terms/conditions have only changed with each renewal which I agreed to and signed. When I renewed my current contract about 18 months ago, I signed for R299x24 months as quoted. The quote did not include any midterm price increases so I was shocked to receive an email from Vodacom advising of a price increase in May 2015 to R319 a month. Please send me a copy of my contract and highlight the section where I agreed to this price increase. CPA requires all prices and future increases to be explicit and explained to the consumer. Vodacom cannot change its terms and conditions and unilaterally bond me to a price increase. The price increase was never disclosed to me when I entered into the contract and it is in breach of CPA (Consumer Right No. 4: Right to Disclosure of Information). Please take note not to implement this ********** increase on my account.