Hello fellow pet care associate!
Pictures can really help us understand it a bit more. As you know... there's sadly certain store protocols that need to be followed and sometimes those are infuriating. Schedule a recheck immediately with the store's vet. Also be sure to touch base with management to make sure other employees are taking proper steps with the sick reptiles as well.
Obviously, whatever the vet says is important to follow, but until then:
With the open wound I wouldn't want any risk of irritating it more. Take out any bedding in there, just paper towels for now.
It sucks cause you still wanna maintain humidity, but any bedding getting stuck in an open wound will make it worse. Mist it down as needed and keep a good sized bowl for the little one
Neosporin is great. Just make sure it doesn't have painkillers in it. Silva sulfadizine from the vet is a much better option for these cases if it's a deeper wound. That or if it's a really nasty tear, it may need stitches.
I would still soak the snake every other day to make sure the wound stays clean. It's important to keep the little one from getting septicemia from this wound. It can also help with some of the stuck on shed, but do not try to peel it off in case that's what made the wound worse.
Depending on how malnourished the baby is, the vet may recommend assist feeding if it still refuses food. Regardless, I would be very hesitant to try feeding this baby anything too large because of the risk of further injury depending on where it has the wound. You may need to start with something like pinkies to keep the wound from stretching and eventually work up to larger meals.
Someone may be able to offer up some alternative advice, but really, getting the vet to see this little one is the most important thing right now.