Crazy explosion in data usage

I'm reading all the comments here. Yes I've been using xfinity for my internet usage for years now and all of a sudden. I'm having a big big big spike in data usage. I went for 700-800 to being over my data usage towards the end of 2021 now entering in 2022 with this stuff going on. Alot of customers and having the same issue. I've been checking online for a virus that runs in the background I did a clean install on my modem reset and everything clean install on every single device in my house hold and still same thing. I'm starting to belive its xfinity and something is going on.