Sorry to see this terrible outcome for you. I would think this is clearly an insurance claim and from the pictures you seem to have documentation. I hope you got a damage report from USPS, UPS, whoever delivered the box.
As Homebrew says I would post on every bike/racing/building/etc. forum you can for the contact info you need, people will want to know about this kind of thing and someone will have a good contact. I would also try to keep the drama out of discussions as hard as that will be. For a damaged shipping claim it does not matter if they took 8.5 months or a week to build your bike. Sticking to just the damage facts might help with Pelizzoli and the insurance claim.
Brace for a long battle with insurance. I dropped of a boxed bike at a USPS Post Office, got the scan w/printout of shipping, tracking and insurance and the box disappeared, never showed up on the USPS computers anywhere. Took months of battling the USPS, calls and letters with documentation and they sent me a partial payment, 75%. More months and I finally got full selling price but not the shipping cost.