I don't know how the trading/consumer standards work in the US, but I would imagine that with 'art pieces' it would be harder to prove that you've received a substandard item unless the statue had suffered actual breakage.
The thing to do seems to be to raise it with your credit card company, PayPal etc, as I've been told that you barely have to prove anything and you'll get your funds credited back. But you'll probably have to ship the item back to Sideshow, and have them credit what they will, and complain about the rest.
I've previously requested replacement pieces from Sideshow and on a couple of occasions (probably more) I received the below from Sideshow (probably word for word):-
"Because these pieces are hand-crafted and hand-painted by individual artists, there will be minor variations in the cast, fit, paint application, and detail work between pieces. Your item appears to have such variation, as the pieces we used for comparison all looked similar or identical.
That said, if this piece does not match your expectations, we will be happy to issue a refund for the purchase price of this item as you are still within our 30 Day Product Guarantee. This refund includes the price of the item, minus any applicable shipping costs and non-refundable deposits."
Because of that I've primarily purchase my items for Popcultcha who don't charge NRDs and shipping, rather than Sideshow direct because I don't want to deal with that.
Just curious does anyone know when that Product Guarantee Window starts? From receiving the item in hand and/or does it restart from the last correspondence with Sideshow?