wifi data over used

<p>I toke out a wifi router 10gig data contract (5gig and 5 gig midnight). I said i would cancel my data on my cellphone and use the wifi. </p> <p>I have not even had the contract for a month yet and i have gone through about 20 gig data all during the day. The first 5gig was used in like 8 days. I want to cancel this contract but i have 7 days when getting the contract to have cancelled it. So when i call vodacom they said to cancel the contract i must pay in R5400 in.</p> <p>When conected to the wifi the updates happen automatically for your cell phone. </p> <p>I have phoned vodacom customer care and the solutions side like every 3rd or 4th day, its is crazy.</p> <p>I dont want the wifi router, they should make the cool off period 30 days and not 7. i would just prefer to load the data onto my phone myself.</p>