Ring Alarm will NOT connect to Wifi

Hi, My alarm base station is constantly using the mobile network instead of my Wifi, it will not connect to wifi no matter what I try. Router 1 (I have two networks available to me) is about 2.5 metres away so no problem with signal, many other items are connected without a problem yet the alarm base station will not connect. Router 2 further away but with a decent signal (both on different internet lines) also will not connect. I have a floodlight camera and 3 other cameras ALL connected without a problem, I have tried rebooting everything from router to resetting the alarm and still no connection. Need help please.