RIDICULOUS data charges!! 14G /1 week?

I have been a loyal, paying customer of with Autopage since 1999. I have my main mobile line and then a separate CELL C data line (2 gigs) for my tablet. NEVER, in 3+ years, have I EVER used all the data on my tablet. I never use all the data on my mobile phone either, hardly ever all my minutes. I guess I'm paying too much. This month, I am notified that my data on my tablet is over limits. My 2 gigs have been depleted, AND ANOTHER 12 gigs OVER AND ABOVE THAT!!!??? 14 gigs in 1 week total. How does one do that - supply electricity to SA via a data line?<br> How does this even happen? Do you not realise something is terribly wrong? You should have contacted me on my MOBILE line to let me know of suspicious activity once my 2 gigs were depleted. You are costing your own company and the economy money! I will not be held accountable for your mistakes and bad service - you can pay this. Now you keep disconnecting my main mobile line because I asked for an investigation?? <br> After a 16 year track record with Autopage, this is what you do?