Was the AMD Retail box look like it had be tampered with when you received it from the delivery company?
Did you take photos of the hardware inside the box?
Who delivered your package to your home? Which shipping company?
Obviously someone opened your RX7900XT Retail box and replaced the contents with 2 HDDs either before it was shipped or during the time the GPU was in transit to your house.
If the outside of the AMD package was showing that it was shipping a GPU to you then most likely while in transit someone needed an expensive GPU and opened your package and replaced it with 2 HDDs.
Maybe you can find out who the person was by looking at the HDDs Serial Numbers and contacted the Manufacturer's Support and see if they will give you the owner of those HDDs or at least give it to AMD Support.
I would call the local Police and have them give you a Police Report of the incident to show AMD that you aren't trying to pull a fast one on them.
Once I had ordered a HDD from Newegg and the Post office left the package outside my Condo door on the 3rd floor without letting me know. When I opened the door I saw that someone had opened my package from Newegg and removed my HDD.
I called the Police and had a Police Report made and uploaded that to Newegg. They then went and refunded my money for the stolen HDD. I mentioned if the box hadn't advertised on the outside that it was from Newegg there would have been a lesser chance of someone stealing the hardware.
Now, legally, Newegg didn't have to refund my money since the package was delivered correctly.
I also would complain to the delivery company of the theft after making a Police Report.
AMD Store doesn't have a direct contact but maybe if you open a AMD SUPPORT - Warranty and let them know someone substituted your GPU card with 2 HDDs purchased from AMD STORE: https://www.amd.com/en/support/contact-email-form
