I see it's your first post here, so welcome to the community and thanks for posting! We were able to pull up your account based on your community profile, so we can request your sales call for review.
Any internet activity counts towards your data allowance, data streaming (watching Netflix for example), can quickly use up your allowance.
Keep in mind there are countless factors that can use your data:
- more devices are capable of connecting to the internet: phones, tablets, gaming consoles, SmartTVs, and even refrigerators can connect wirelessly to the internet. Keep track of what devices you leave running on Wi-Fi.
- automatic-updates: your computer and any other programs you use will often keep working in the background, even if you're not actively using that program, in order to keep your system/program up-to-date. Anti-virus programs will periodically use your internet connection to check back with their malware database for any updates. You should have an option to turn off auto-updates and/or schedule them for a later time.