Hello,
I am having pretty much the same issue as everyone here and it has happened before. However, this time my phone has decided to delete all of my music on the phone so I have nothing left at all.
I was getting the splash screen with the girl listening to headphones, when this has happened before I usually restart my phone, switch apple music on and off and it gets rid of it, much like what everyone else has done or suggested here.
I was listening to music on my phone fine yesterday, all my locally stored music was available as were some videos.
Today I open up iTunes store to look for something, then go back to my music to listen to some. All I had access to is my iTunes purchases at first. When I clicked on show only local music there was nothing to be seen. Reset my phone as I assumed it was like the same Apple Music issues I've had before, and I start getting the splash screen. Tried a few other times and eventually got back into my music, however it was the same as before - only iTunes purchases can be seen.
Decided to check my storage and my phone is practically empty. There is no storage options for Music or Videos like there is for Photos, Messages and other apps.Everything is gone it seems. Apple Music without prompting or without warning has delete everything locally stored on my phone and continues to insist that I join Apple Music to listen to music or buy from iTunes.
To say I'm annoyed is an understatement. I don't have access to my home computer for another week so can't do any syncing or recovering. I can get on Wifi but that's it, no network or anything.
I can't see any way of fixing this, and reading other responses on various forums it sounds like there aren't many people suffering from the same issue either.