Xfinity over counted the amount of data used in the month of July for my account

In the month of July Xfinity has calculated an absurd amount of data used for my account. Almost nobody was using the internet in the middle of June through the middle of July as we were traveling but somehow I received an email from Xfinity saying that I had used up almost 1.2 TB of my data even though there was no gaming, streaming, or heavy uses of data going on. In the months of January - June when we were at home and using data for Zoom, emails, and youtube on a daily basis we had only used a third to a half of the 1.2 TB. So Xfinity how is it now that when we were not at home and very little data is being used at home were we almost exceeding 1.2 TB? Also why was one of your agents from your technical team instead of working with me on the issue started to offer me internet plans for the same price with an included streaming kit that I didn't need. This is a scam! Why is there no easy way to see how much data is being used on each day of the month? Until I get a report of how much of my data was used on each day of the month and by which device you guys have no right to begin charging me an extra 10 dollars for the extra 50 GB. This is a scam. Xfinity start taking accountability for your lies!