Ring alarm - disappeared from my app

Hi, suddenly the alarm base + all sensors disappeared from my app. The system works fine only without the app. I can still see the History under History tab. Tried to sign out and in. Also reinsatll the app - with no success. As the unit is already registered i can't install it again unless i delete frist but as I can't see it on the app - i can't delete it .As i live outdise the US they could not help me. I just need to make factory reset to the base unit so I will satrt the process of installing as if I just boutht the kit.PLEASE HELP