Now many international buyers swindlers pay by credit card and then go to the bank to cancel the payment, saying that the payment has not been approved by themselves or the account number has been stolen by others. The bank will get the money back immediately, the seller's goods are sent out, the money is returned, and the money and goods are empty.
I don't know if the item you bought is because the seller has set up a refusal to pay by credit card. I have been selling things on eBay for several months, but I haven't heard of this payment option. I'm just guessing.