It looks like you signed up with Xfinity Home under a non Comcast email domain. You cannot use the mobile app unless you login with a Comcast email. I can help you open a ticket with Customer Support if you private message me some details or you can call our support number and ask an agent to set one up for you.
I have already sent you a private message.
Your broadband is down which means your touchscreen (panel) is offline. In order to arm/disarm your system you need to restore internet connectivy to your touchscreen.
Please go here for troubleshooting steps: