Have you considered buying locally?
We're lucky here, got my chicks at less than 12 hours old- bright-eyed and well hydrated? May and June hatches are such good times, too.
Do you know their hatch date?
Wondering if too long in transit and possibly dehydrated.
I'm so sorry, phone McMurray, I know that it doesn't help with your distress now, but will give you information on what happened.