Verizon Wireless and going over data plan

I can't remember if I read it on this board or somewhere else about Verizon and their shady practices with data allotment. I was curious if anybody else has this problem.

I switched over from AT&T to Verizon right after the flood. If there was anything I wish I could go back in time for, that would be one thing for sure. I'm not on my phone a whole hell of a lot, at least not as much as most people.

For I don't know how long, I've always had the 2 gig plan for data. That was more than enough for me. With exception of a month or two, I always carried over data from rollover. I want to say I had about 6 gigs the day I switched from AT&T. Since I've joined Verizon, I've gone over every single month I've been with them. You automatically get a gig and automatically get charged 15 bucks with Verizon. It happened again this month to me. As a matter of fact, it happened...and in a course of two days, I blew through that gig so here comes another 15 dollar charge. Enough is fricking enough already!

I don't watch movies on my phone, I don't sit on it all day, when I'm home I use WiFi instead of cellular data. I'm scratching my head at what the hell is going on? The only thing that I can come up with, is Verizon is up to some shady shite when it comes to their billing department.

Anyway, I was wondering if anybody has had a similar experience. Sorry for the tl;dr novel I had to write. Am currently in the process of ditching Verizon over this.

ETA:
The CSR I just talked to on the phone with Verizon gave me all kind of settings to tweak, but like I told her - I didn't have to do any of that with AT&T and rarely did I go over my data allotment. They didn't have unlimited data when I had AT&T. It was a complete like for like switch with my plans.