If you want to repay the seller, contact them and offer to pay again.
You can't do this through Ebay but would have to pay via Paypal, bank transfer or send a cheque or Postal Order.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)