I am an extreme newbie to eBay. I bought something and I pressed the Buy now button twice on my phone so committed to buying it twice. I messaged the seller and let them know my mistake and only wanting 1 of the item. I however then recieved an email from them stating they have combined postage. I don't want to pay for it knowing I have messaged the seller and didn't intend to buy the item twice.
What else can I do? I thought I already paid through PayPal but haven't as I checked this morning.