Data depletion

Last months I complained about my data being depleted for practically being while I was practically sleeping. Vodacom gave some explanation of what could have happened I said ok. That line has not been in use since that day, until I put it into my router yesterday at about 21:00. I visit sky sports, goal, [URL Removed] browser through my Facebook wall and I sleep. I wake up and my 5GB and my 5GB night owl are depleted for browsing less than 20mb worth pages. Not only is it depleted, my monthly R259 bill moved to R1750.I have all my browsing history, ny update history of all devices. I got to Vodaworld to find out they saying they can't tell, they will log a call for someone to get back to me. This started the day after I canceled the line, I find it a confident that this is happening to this specific line but to on my 060 line, which I have been using it since beginning of the months. No way in hell I will be paying for this. Even the 259 since I never got to use that data. I won't pay for services that were not provided to me.