Sounds like it got damaged (dropped) either during shipment or when being packed at the factory.
If the GPU has bent brackets and it is difficult to install in the Motherboard's PCIe Slot and screw down to the PC case I would RMA it.
I would take photos of all the damage and package it came in if it looked like it was also damaged as proof.
I would open a ticket to the retailer to return it and have it replaced with another one. If bought directly from AMD STORE then open a AMD Warranty Ticket from here: https://www.amd.com/en/support/kb/warranty-information/rma-form
Note: AMD Warranty starts when the Retailer's Return date or its own Warranty expires first.