speakers keep disappearing and coming back

When I open the app on my iPhone sometimes it only shows one of my roams saying the other is powered off.  But it doesn’t show the other speakers, arc. woofer, 2 rear and 2 move.  Sometimes they’re there, sometimes not. I spent over an hour on chatting the other day, so long that my phone needed charging. It was working but a few hours later it isn’t. The tech wastes your time plugging and unplugging and reregistering and other nonsense.  But a day later the problem is back. The speakers come and go.  I can play music on the Roku tv which uses the arc, sub and back speakers but on the phone they’re not there.  It is getting to the point where I have to admit that I wasted almost 3 thousand dollars on a system that is unreliable and sonos can’t fix it.  Unplugging some of the speakers, which the tech makes you do, are behind heavy couches. I’m and old man and its hard to move these big heavy couches and harder still to get the plugs back in. Used to love the system but now it sucks . The trouble seems to have started when I bought my second roam. Very frustrating and I can’t  really afford to replace the whole system...