Sonos Tech Support (STS) is alive and working. As they are inundated with requests to correct issues with the new App and other requests the only option is patience.
There is an issue with the Balance Slider and Sonos Amp with Sub which you can read about in the link below. I mention this as so many have complained about STS and lack of responsiveness. I just had to bite-the-bullet and wait my turn even though I wanted the issue fixed yesterday (tongue in cheek) .
Bottom-line STS is responding and escalating issues when necessary. They even gave me a return call when I scheduled a call-back to avoid waiting on hold.
STS will have you go through steps that you may find annoying (or painful). However, that is the only way an issue can be identified as legitimate to determine if it’s user error, network and/or software related. It’s really basic trouble shooting for Tech Support anywhere.
I’m sure many will disagree with what I’ve written and that’s your prerogative. Ce’ la vie!