[buymycards]

Why did you wait for an invoice before paying for the card? You can pay immediately without waiting for an invoice. If I was the seller, I would be wondering why you haven't sent payment. I normally try to pay within seconds of buying a card. If I make multiple purchases from a seller, I will usually ask for a combined shipping invoice right away.

I don't think the seller is at fault at all. You didn't read the description properly and you bought the card without a back scan. Don't blame the seller.