I used my 4 LTGE approximately 30 times, once a day, for about one minute each time. Then ALWAYS turned the wifi OFF. So, please explain these high charges on my bill.
Unfortunately you actually answered your own question. You turn cellular data off! Not Wifi.
Wifi is free and does not go against your data allotment however cellular data 4G LTE does go against your usage.
You have to pay attention to what you are doing. Not Verizons fault this time.