I would definitely be talking to that guy because I would never sell eggs once they start incubating. Once they're in the incubator, they aren't leaving until they are hatched.
A two hour drive home lets them get cold, plus all the shaking and bumping along the road isn't helping them in any way.
Despite that, they might still hatch, two hours isn't a huge cooling off period depending on how far along the eggs were when you bought them.
What are your incubator conditions like now? Do you know what date the eggs were set? Because, like was said, they can hatch in 28 days, but could take up to 35 days.