Hello, jasonlangheim. Welcome to the Xfinity Forums!
I'm sorry to hear you've been having trouble with your gateway and the xFi app that has resulted in your home security being compromised. I would like to work with you to get this corrected as quickly as possible so you can feel safer at home again. Please send me a private message with your first and last name, as well as your service address so I can assist.
To send a private message, click my name "ComcastTambrey", then click "send a message".