DISGUSTED IN VODACOM UPGRADING CONTRACTS

I am absolutely disgusted that Vodacom is able to change contract prices. I signed 3 different contracts ranging from 24 to 36 months which are supposed to be fixed amounts for the duration of the contract and suddenly I get a cute little letter from Vodacom to say I have been upgraded. I didn't ask for this upgrade, it is also a well known fact that we have the most expensive data in the whole world and they are laughing all the way to bank. I am very disappointed! I will cancel my contract as soon as it is paid up. So it obviously means nothing that I have been with vodacom since 1995!!