Data gone in no time

I have three contracts with vodacom. The last three months after phoning the complaint and technical department, my data still VANISH?.... all the background and updates are restricted. I canceled my emails, my FB, and don't use internet on my phone. My rooter the same. 1GB last three days........ It never happened before. I wish my contract was close to the end, to change to another subscriber. Vodacom become the most expensive data Eater Just beware not to go to vodacom please Other networks are way cheaper