Go through airtime like crazy

<p>I use a lot of data. The problem is that I used to get an SMS to say that my data is running low. Lately everything just stops working because even my airtime is finished. So I've stopped getting the SMS's and then they charge me a hell of a lot extra for using out of bundle data. Which means lately I've been going through airtime like it's a joke. Then I wanted to send vodacom an email about this to try and find out why and conveniently for them you can only phone them. </p>