Rep Power: 727

I was wondering if anybody has ever been in the same boat as me and what they did about it?

I had a shop (not mentioning names for legal reasons) do a b-series swap in my car last May. And now my tranny has a big chunk missing. I had the clutch done, by my trust worthy mechanic, a few months ago and he pointed out to me that one of the bolts were missing from the rear mount and that the holes didn't line up, but i figured if the shop who did the swap left it like this it must be ok, because what kind of shop would knowingly install something incorrectly?

So i confronted the shop who did the swap and they said that they weren't willing to do anything about it. I told them that all i wanted was a new tranny and the proper mount, which should have been used in the first place, and that i didn't want them to do any labour. I paid for the right parts but the right parts weren't used and now as a direct result of this my car can not be driven.

What would you do?