If you purchased the processor directly from AMD then it has a 3 year Warranty for a AMD Retail Box purchase.
Normally the Warranty starts AFTER the Retailer/Vendor's Warranty expires which isn't in your case.
So you already opened an AMD RMA Ticket to replace the processor. Now it is a guessing game to find out how long it will take AMD to replace it since it is such a new processor recently released to the public.
Personally I wouldn't have accepted the shipment if the Shipping box was damaged and tell the shipper to send you another one. But it was smart of you not to break open the plastic clam shell that shows bent pins. Plus you took photos of the damaged processor packaging.
You are quite correct that AMD voids the Warranty on any bent or broken pins on the processor (Customer Error, normally).
But since you didn't break open the plastic clam shell that proves to AMD that it was the shipper's fault for damaging your processor.
I would believe you either have to open a claim with Digital Rivers (Shipper) or AMD would have to open a claim with their shipper to have your processor replaced as DOA or replace it under Warranty.
Either way you should receive a replacement. Possibly one of the Moderators can inquire about the turn around on the RMA process for the new Zen 3 processors.