I don't know the item so have no idea whether your bought a fake and tried to resell it or if it was indeed authentic and their "team" erred.
I don't know who their "authenticators" are but there's a history of Tradesy using a particular company who had a reputation for mis-authenticating items.
Therefore it's possible that the item is authentic and that the seller didn't really sell a fake.
I don't know who their "authenticators" are but there's a history of Tradesy using a particular company who had a reputation for mis-authenticating items.
Therefore it's possible that the item is authentic and that the seller didn't really sell a fake.