Of course I've tried that. They're hacked into everything: phone, emails, wifi, texts, firestick, accounts and they're not just stealing/accessing those they have also been committing identity theft using my info online. I just can't believe that Comcast/Xfinity won't do anything. All they have to do is look at the my account section for my account and that'll be evidence enough.
This is where I change my Account username and password;