A number of us have been trying to get a response regarding Google Apps accounts with Play Music, and we're paying customers. There's no response to the forum https://productforums.google.com/forum/m/?utm_medium=email&u... nor when I put it on Twitter and when a load of us tried direct feedback via the app, that still hasn't got any response.
Clearly their model needs to rely on limited user support and that's okay, provided there's a good service with some human presence. But it's getting to be a problem...