This really sucks. :/ I wonder if they could enforce a no loitering policy, and maybe have a waiting room for contractors waiting for their orders to be completed.

I once had some trouble with Home Depot customer service (i.e. told me that they had NOTHING like what I was looking for and was watering my potted plants incorrectly), but Tim called and talked to a manager, and they were super apologetic, because that's not how people are supposed to be treated in their store.