Update
Well the argument has been settled. It's being delivered Thursday and we're not even bothering with have the "damage" repaired.
We went to have a look at it this afternoon, and the "damage" consists of a few minor dirt smudges on the fabric which is UNDERNEATH the sofa. He pointed out a hole in the fabric that you'd need a microscope to see it. Well okay, I'm exagerating, but it was probably about the size of if you were to shove a thumb tac through the fabric. That's how tiny the hole is.
If they wouldn't have told us about any of it, we'd truly never would have noticed it. Got all worked up over nothing.