The seller had multiple items for sale. I contacted them ahead of bidding about whether they'd combine postage, which they agreed to. I have since won the items and they've sent an invoice but postage is a significant overcharge.
I've contacted them, asking them to amend it to a more reasonable figure but I am getting no response (they were previously very quick to communicate). I'm now getting reminders from eBay saying I'm committed to the purchase and need to pay for the items and that if there is an issue I need to contact the seller.
Can anyone advise as to what I can do? It's only about £3 difference but I resent having to pay it as it's a significant proportion of the overall cost of the items. Do I have to just pay it now and leave a poor review? I'm really pissed off to be honest!