Vodacom not respecting set limit

I set a limit of R50 on my data contract just recieved a debit order of R7000.00. <br> <br> I set a limit for the reason. <br> <br> I recieved no warning sms that my bundle was up (i requested that all data sms be sent to my phone) i also recieved no email or notication of that limit policy<br> <br> Why must i pay for vodacom incompetencey!