u/Budget-Hovercraft487

Last week I ordered a leopard gecko with a specific trait. The first animal they sent was the wrong morph (entirely different trait), and I exchanged emails until I went from a partial refund to them just sending me a replacement. The replacement arrived with a major physical disability (blindness). I've provided video evidence, but the merchant is saying that it's "trait-related issue" when I quite literally have another gecko of the same morph but that one isn't blind. I just wanted the animal I ordered to arrive in healthy conditions. Can I file for a chargeback? The initial error and now the deflective replacement (I would ship them back, but I am responsible for shipping)