Verizon Verizon Wireless Data out of control Nationwide Nationwide

We have always used 4gb max on our data. We switched to 6 to make sure to get no overages. Then Verizon did a promotion for 8gb free(extra 2gb) and we signed up/. NOW the last few months it is close to 8gb in usage and our cell habits have not changed. We have talked to them and get the same response. We are both on wifi 95% of the time. All the time at home and when she is at work. No explination from Verizon. I have chatted with them and made sure there areno games. no streaming and have went to bare min. on apps. They offer a tech and tell me it is not them. I am fed up and what is funny if everyone I talk to says they are having the same type problem.