3000 RAND BILL ON A 149 RAND DATA CONTRACT

I have a Vodacom data contract for R 149 per month. This was R149 per month 1Gig contract. Now this months bill is OVER R 30000, call centre says \open ended"contract and next months bill is already over R1000 I try explain that the consultant.To open an OPEN ENDED data contract which is in a mobile ****le is pure recklessness and nonsensical. So we get sent from pillar to post trying to sort the problem out .Vodacom says i would have received sms's....but how when the sim is in a ****le would i have received such??!!! How is it at all possible VODACOM that you can do this and then offer no assistance when we call and call to try and get an answer. Now i have to wait until the 16th of November to get answers!! Do i have to cancel all lines and become an angry upset customer who migrates to another provider for someone to contact me? Carl at the call centre had an attitude. I want this problem sorted urgently. This is unacceptable."""