Do follow-up with the manager and owner of the store. Those clerks have NO BUSINESS working there and if they treat a rabbit like that chances are they'll do something similar to other animals.

And then there are the people who don't understand why some rabbits aren't sweet, lovable creatures wanting to be held and cuddled......after an experience like that, I wouldn't like humans either!!! This is terrible!

Let us know what happens.....(kinda surprised you didn't rescue that little baby Heather!!! )