crazy data bill

<p> I am currently on a Smart S , with 1GB data which has a monthly cost of R323, my last 2 months bill from vodacom has been R3400 for April and R7500 for May, the bulk of this is "out of bundle" data rates, at the point of switching from "in bundle" to "out of bundle" vodacom don’t inform you of what is to be cost expectation of this and now I end up with exorbitant data bills. With a month subscription of R323, and ending up with a bill of R7500 does this not raise any suspicion that there is something clearly wrong? And secondly how does vodacom think that with someone who is on a R350p/m package is going to be able to afford a R3400/R7500 bill. This is extremely irresponsible of Vodacom as they defiantly don’t have the customers interests as a priority.</p>