My problem has been resolved. I don't know if it was an app update or if it was Google that fixed it. I contacted then and went through the usual remove account, add the account, remove updates and factory reset. They sent the ticket over to a specialist a few days ago, I haven't had anything else from them but it is working. I just wish I hadn't deleted most of my playlists.
As an update, advanced support contacted me and tried to go through the same steps that had already been done so it must be an app update that has fixed it.
Facebook
Twitter
Instagram