UPDATE

So after calling and monitoring and logging on a spread sheet, my data almost every hour, our average daily was less than 5 gb, for several days.

My billing just rolled over and went from 0 GB to 13 GB in 1 hour, then 13 to 17 gb in the next hr, and we have nothing connected!.

Just not sure what to do, we are using Xfinity wi fi hot spots for all our devices and it still goes up at a unrealistic rate.