Please beware of me&you mobile terms

Hi. I have been trying to sort out a problem for over a week now with being overcharged for data i never used or never even appeared on my account. I never got usual sms to say you 1gig is almost up and on my profile it never showed data being used through the month as i checked regularly. They have just tried to debit a extra R5000 from my account when my profile said my bill was around R480. The cap which is supposed to stop your account at R600 is apparently does not work its just to make you think you covered but i was told by a few people at there office the cap is not guaranteed so you can be charged over your cap or limit if they decide. My phone is now soft blocked so have no data or out going calls so difficult to run a business when you on the road most of the day. You can not get to speak to anyone in charge only a call centre which has no idea or authority to sort out a problem. Now have to carry extra phone with another contract till sorted. There system has major problems but all they care about is your bill which you have to pay for there mess ups. Been with then for a year a very disappointed as i have recommend them to lots of friends and now have to back and tell them this story. This is a case where management hides behind the call centre. If this problem is not sorted by end of monday, going to consumer protection and placing some adds warning people of there conduct.