As jr. said, unfortunately much of this was preventable and like most things, wins are engineered/ planned, not random.
If you're gonna do it, do it right!
As far as the current issue, was it ever talked blabout that he would sent 2 cues? Maybe it could be that any surprise items not agreed upon can't be claimed?
I think you either suck it up and pay the guy or make him file a claim with the shipping company. I like the claim thing coz then you have a party that has experience with these things and will respond in the way that is normal.
I do NOT like throwing him partial cash for the item