vodacom worst service just want your money!!!

I have been charged for data usage more than I should have been. My account is to stop at R3800 that was explained to me when I got the contract. Now when it went over with no warning first time ever after being a very loyal customer I have to pay R6700.Because in the contract, in the fine print, it says they don't have to stop the account. This was never explained when I got my contract. After I lodge the complaint they don't even give me a percentage of discount after I have made over 20calls to call centres and been to 7 different Vodacom just to find out what is going on as nobody is calling me back. with no luck at any Vodacom and not even managers getting any answers with the data call centre or the business department. Nobody wants to help me!. They just keep sending you to another person for 2 weeks already. I have paid my account this month and the high data usage bill to be paid for April 2015 now they have just suspend my business phone . I have to make money with to pay this bill. I'm a very unhappy client and do not deserve this at all. I don't have the money to pay this bill and nobody even till today called me back or tried to help me! VERY DISSAPOINTED!!