PUTTING ON ME ON WRONG CONTRACT

In Feb I got my Invoice which was R3309.00 whic was impossible since I've got a top up not suppose to go over R200.00. I called them they said that there was an upgrade done and that it wasn't on top up. I explained that I specificly asked for an top up because I didn't want this sort of thing to happen. They said they will investigate So the 01 March they called me saying good news it was Vodacom's fault that they will reverse my account. So the whole of March they called me saying that I need to pay for my account. Then I've called them every second day and then they said they will get back 25th March the guy said I must wait until the 01 April then it will be fixed. 01 April still not fixed, I payed my other accounts because I have 3 accounts with them but they have now suspended all of my lines. I've been on the phone with vodacom for 4 hours now being transferred from the one department to the next, Every person say something different. So now my line is blocked because of Vodacom's fault and no phone line even though I have paid that line. and no one helps me they promise to call me back but no one calls back. As I'm writing this I'm on call waiting for vodacom