Paying for nothing

<p>I took out a tablet contract with Vodacom last year during May. Everything was ok until recently my data now does not last even for a week. I called them last month to complain about it as I don't regularly use my tablet and I don't even download with it. I was adviced to switch my data off whenever the tablet is not in use. I did just that worst part the device was even switched off but the data is finished. This is the third month I have been calling and I don't get any help. They know how to deduct my money out of my bank every month but they can't find a solution to the problem that I am currently experiencing. They most frustrating part is that I am forced to stay with Vodacom until the end of my contract </p>