As the transaction closed with a refund you cannot repay the amount now through eBay.
Was this from a UK seller? Seeing you are in the Netherlands the only ways would be for an international bank transfer, a Friends and Family PayPal payment, or for the seller to send you a PayPal invoice.
If PayPal is used, email addresses need to be exchanged, this can sometimes be found with the order details >> Show Contact Info. If not and you need to ask the seller for this, make it very, very clear in your eBay messages, as eBay do read these, the reason for these exchanges. Make it clear it's not to be used for an off eBay sale.
@alha671
