Send an email to email@example.com and they can go over your usage with you and try to help you figure out what type of usage used all your data. Include your account number or the phone number attached to the account.
Other then that make sure all computers tablets and anything else connected is not set to auto update
Hello 50mary22, I agree with our forum champion Knight Rider, for quick assistance you can give our Customer Care line a call at 866.945.3258 and they would be more than happy to review your account details and check your usage categories to help figure out where your data is being consume or you can send us an email with your account and contact information to firstname.lastname@example.org and we can assist as well. Thank you