APP noy work at all-System SONO full down and don't work

HI,from today all my SONOS speakers are unusable, the Sonos APP made the SONOS Roam SL disappear 4 days ago, today N.1 Play 1 disappeared and the other one survives but I think this one will soon leave my WFI net too. IT IS NOT POSSIBLE TO RE-INSERT THEM INTO THE APP WITH THE RESET PROCEDURE, the APP crashes or the procedure ends but there is no trace of the speakers in the APP. Can I go back to the previous version of the APP? the previous one worked for three years, with this "NEW APP" it is a continuous disaster and it is a fact that I can no longer use the speakers. I'm quite annoyed by SONOS, the chat and the support phone number are impossible to contact, always waiting, waiting congratulations.This is second my post for this problem.For SONOS the NEW APP can be a big problem.