Internet Usage

I do see many posts on spiked internet usage, family of 2 who are at home very little, using between 250 to 400 gigabytes each month until January 2022, Our usage spiked over 15 times above normal to over 6000. Called support , claiming we were possibly hacked, someone using Wi-Fi? Changed all passwords, started monitoring all traffic, and again this month using same amount. After reading all the posts about the same issue, I am guessing this is an infinity problem or scam. I guess we all have not choice but to cancel services and wait for the lawyers to pursue. Years down the line we may get a few cents back. Very disappointed!!