Im so sorry this happened!
I have learned, just like you, the hard way.
NEVER accept a shipped pinball machine with box damage unless you can cut the box all the way down and see exactly what you are getting. They can always tape it back up and send it back.
After you get it home its really difficult to get traction on a replacement as too many hands are in the fire now.
However, with patience and being firm, you will get a replacement.
You really have to get it back to the depot as fast a possible and make a claim.
As far as the value of the damage, its a total loss including the shipping price.