X1 Factory Reset?

I am posting on behalf of my aunt, she is considering cancelling Comcast because of the terrible experience she's had so far. She's had numerous techs out, none of them have solved the issues she's having. She currently has boxes that were rented to her by Comcast that have someone else's account on them. She refuses to reach out to Comcast because of other issues. A Comcast tech recently took apart her printer per her , and basically broke the printer. I have a friend who works as contractor for numerous companies, he has done work for Comcast in the past, he checked signal levels and everything is within range.

So is there a way to resolve this without calling, etc? I was thinking a full factory reset would take care of the issues she has with her boxes.