Without a picture it is hard to help much but I can tell you that I have a Sleestack x Skunk that has been stunted for weeks. It was a freebee and I thought it would die(seemed it was water logged), I didn't water it for a week and a half then just sprayed it for a couple days after that. it is coming back slowly starting to show new growth but it is still the size of a 5 day old seedling at almost a month old.
The best advice I can give is don't mess with it too much, let it dry out some then give it a very light watering or a consistent misting. If it doesn't come back it wasn't meant to be, start with a new bean...