Query - but no response

I contacted Vodacom to enquire why my monthly subscription is going up - i got an automated response email to say that an agent will get in touch with me within 24 hours - that was last week Tuesday... I want to get hold of the CEO of Vodacom to tell him what shocking service his company offers!! Apparently it states in the small print that Vodacom is allowed to increase your monthly subscription at any time - wow, so this a win win situation for Vodacom - so if they **** each and every subscriber into signing a 2 year contract, and then randomly put up the fees, we have no leg to stand on... Typical big corporate company - when you don't have coverage, they're not to blame