MISLEADING ADVERTISING!

I have many contracts with Vodacom, some for many years. Upgraded recently on one of the contracts and asked for a cap to be put on it so that I could afford to pay it. The data was capped for a few months then the cap was removed and the account is now sky high and unaffordable. I did not ask for it to be removed. When I complained to the customer services twice, they sent an email saying that if there is a technical error, they are not responsible, I must pay. Phoned in to ask if I can pay it off, the lady said she would lodge the request and someone would call me within 24 - 48 hours to give me permission to pay it off. This was on the 3rd of August - still waiting for a call. My next bill has arrived - no cap again!!!! Why does Vodacom advertise this limit if they intend to cheat us out of our money!!! What a ****!!!