Price Increase

I have been a loyal Vodacom customer for about 14 years and cannot belive that they would blindside their customers. <br> <br> I received an email from Vodacom today stating that the subscription fee on my contracts will increase in May 2015.<br> <br> I signed a 24 month contract, agreeing to pay a set amount for the duration of the contract. <br> <br> Please send me some sort of proof, stating that I agreed to have my tariffs changed as you see fit. <br> <br> Once my contracts have reached its term, please note that I will be canceling them and moving over to a different service provider. <br> <br> This is utterly disgusting.