Greyed out in Drive means a recently deleted file, likely still in trash for its 30 days. Look in trash for a match. This is a problem with Drive, that the "Remove" tab has no "are you sure" backup, and accidents are all too easy, especially in that things can be deleted from Docs as folder and/or open document, and in Drive with a single touch.
If no result there, the only Google C.S. just happens to be the Drive team, which can be accessed thru Help while in Drive.