Vodacom's useless alerts

<p>Vodacom is ridiculous and need to know. I normally get message notifications immediately after purchasing data but to my surprise....your system cannot detect in time to notify me just before my data gets depleted. It will just send an alert that:</p> <p>You have been paying R2 per 1MB since 7am. Buy a daily or 30 day bundle from as little as 43c per MB. To buy dial *111*1002</p> <p> </p> <p>when I switch off mobile data and check airtime....R0.01 left. This is really annoying and I know that you are aware. </p> <p> </p>