Found my dads original 1971 duster!

Wow. I can't begin to imagine how much it hurts right now. The amount of money you have been conned out of is bad enough. For this asshole to have done the damage to your dad's car and still face you when you arrived to pick it up is sickening.
I am truly sorry to hear about this, but you must publish the name of this person or shop so that he can't **** someone else over.
I agree with the previous posts that you should just park it and cover it up for a while until you get a better mindset.

I experienced a similar issue with a 'professional' body shop that I had do the prep work on my 1970 Dart long ago. It came back from there with the driver's window covered in burn marks from welding splatter, and the body had more waves than the Pacific ocean. I was so upset that I rolled it into the garage and closed the doors, left it for a while until I calmed down. I found another shop that was able to block sand it until most of the waves were out and do a quality paint job for what I felt was a fair price. I did all of the reassembly myself and I still don't trust very many 'shops' to work on anything that I own.