Sonos and Printer and Orbi 870 mesh

Guys:

Today my orbi app and the orbi website show 19 devices on my network.  The other 10-12 that I have do not show as connected under either the router or the satellite, but they do show as "unconnected" devices.  In reality, the devices (laptop, iPhones, nest thermostats, etc) are connected to something and can access the internet.  This is a new issue.  I have rebooted everything several times, uninstalled the app and reinstalled it.  Turned devices off and on.  All software is up-to-date.  No luck with anything.

I do appreciate all the info about channels, and MAC addresses, and address reservations, etc., but although I went to school as an engineer, I was a structural engineer.  I don't claim to know a lot about the internet and how to connect, but I am fairly technically minded.  I have to say that installing this Orbi 870 has been the absolute worst experience that I have yet encountered with any network. I was hoping for a plug-and-play solution as advertised, but haven't experienced anything close to it.   Netgear support is really good at telling me that "they are researching the problems and will get back to me ASAP," but that's all they are good for.  They never return emails or calls.

I put in a claim today with my credit card company in hopes of getting a refund for this Orbi 870 network.  It is a total waste of my time to continue to play with it.  It just does not work.  If I can't get a refund, I'll probably end up just throwing the whole thing in the trash and getting another brand.  If I sound frustrated, I am.