Alarm going off because of “door open”

I set my alarm twice now and it has been set off when no doors were actually open. Alarm says front and garage door set it off, both of which I think are monitored by the DSC intrusion detector, but it doesn’t run off batteries like the normal door monitors, so I don’t know what to do now?! I’ve tried calling Xfinity but it’s impossible to get a human on the phone and the “trouble shooting” articles just say to change the batteries but this thing is hard wired so I’m going in circles now?? Because of Covid I can’t get anyone out to my house now either and have not been able to set my alarm for over a week!! Can anyone help??