Ring Doorbell 3 refuses to connect to the app

Hi all, new ringer here. Just taken possession of a new Ring Doorbell 3 and I’m now questioning myself…why did I do this. I thought these things were supposed to be 1d1ot proof. The cam is in setup mode ie spinning white light but when I add a new device to my phone (Pixel 7 Pro) i get “We had a problem adding this ring device to your account”. I’ve tried 3 phones (all android), reinstalled the app, put the phone, doorbell and router right next to each other and absolutely nothing works. I’ve done what ring suggest ie turn cell data off and only use wifi, again, same message. I 'm grey already so can’t go greyer, just end up losing hair over this. Cheers