[ez-1]

Just show them the pictures that you took from the shoes and then point them to some website presenting the real ones. Even better if someone here who has them could send you some pictures. That heel clit is just so clear example and also same numbers in both shoes.

Edit:
Claim might take 1-2 weeks (sometimes even more) to get resolved so take it easy. Don't give them any leash and stand your ground. Also only show/tell them facts and you should be good.