Well you’re going to have to define "sub par shipping” and "they didn't make it" how did they ship them? (Next day, 2 day express, no insulation??), the zoo's are totally missing, melted, munched on, or just not opening??
How long have you had them?
Sometimes zoo's take a while to open, I've bought stuff from the local fish store that didn't open for a week, but were fully open in the store when I bought it. A week later they were just fine. Same as with shipping sometimes it takes a week or more for them to open.
Then again I've had zoo's that opened up after a few hours of putting them in the tank.
Some zoo's are sensitive, some are not. Usually zoo's are pretty tough and it takes allot to kill them.
I would say if your zoanthids still have defined polyps, (meaning when closed, you can still see each individual polyp, and they have not melted or are damaged/munched on by bugs) then there is a good chance that they will eventually open and live.
There are many things that can lead to zoa's not opening
Water parameters, critters in your tank, heat, cold, lighting, it all depends on your tank and the sellers, they need to get used to a different environment, and sometimes this can take time.
This is why most sellers only offer a 2-4 hour arrive live guarantee, its hard to tell (if not near impossible) what the condition is of the tank they will be going into (Don't get me wrong, I am in NO way implying that your tank conditions are sub par)
But a great majority of the time the coral is not going into a tank that is exactly like the tank they came out of (temp, lighting, parameters and so on....)
I would say, unless the seller does have a guarantee and you notified them about the condition of the zoo's directly after you received them (within an hour or so), you’re pretty much out of luck.
Corals are living things and sometimes they don't make it, no matter how good the new environment they are going into is.
Hope this helps, maybe you could post some pics of what they look like, so we can help you further.