Data dissapears for the second month in a row

Hi,<br> <br> Last month about 800MB of my Data just vanished from my account, when I called the call centre they said well they see that my browser is running and that is why. My browser was closed and data usage for it was switched off!!!! They then said there us nothing they can do. Today I check my data balance and once again there is about 800MB of data that is gone. I had 1.1GB of data last night and now have just over 300MB. This is ridiculous. This is my second month on my new contract and find it a complete inconvenience that I have to keep checking my data regularly due to the fact that data is just vanishing. So now I have lost about a total of 1.6GB and I have to go and buy additional data due to the fact that Vodacom is ***********. I have an IPhone and I can see that I have not used this amount of data!!!!