Farmer Viola, thanks so much for the site. Its critical information for recognizing and treating wry neck. I have not had the experience but now know what to watch for.
I'd take it to a vet because you need professional help and you might find out a surprising way to help the chick. It could turn out to be a pulled muscle rather than a deformity of the neck bones. Only a vet can tell you for sure.
Outside of that your only option would be to research the...