Support
Email dgtol@me.com and a person answers, usually within a day.
Nothing plays
Airshift plays through your own Apple Music subscription. Check that you have one, and that Airshift has Apple Music access under Settings, Airshift.
A song is skipped for me
Some songs aren't on Apple Music in every country. Airshift tells you and you rejoin at the next song.
I can't go on the air
Hosting needs iCloud signed in on your phone, and a handle, which is the only sign-up there is.
Report a station
On the station's screen, open the menu at the top right and choose Report. Reports are reviewed within a day. You can also block a station there.