Hi Crispy
Don't despair.
You don't mention if there were any queen cells in this one. If there is, park the nuc in a sunny spot and hold off for a week, then take a look at what's happened.
If there is a queen cell, you can give your vendor the flick and hatch your own. Alternatively is still no queen, insist he give you a LAYING QUEEN IN A QUEEN CAGE. That's the least he can do for you.
Regards Mark