If the Post |Office are asking you to pay postage then they have it
Ask the seller to pay the postage and if not then you just leave it
If you have not recieved your item and it is past the latest estimated day of delivery on the item description
then you can open a not recieved dispute one day after the latest estimated day of delivery on the listing.
You can do that at the bottom of the page under Resolution Centre
Escalate it too ebay after 3 full days
You have 30 days from the latest estimated day of delivery on the item description to open a dispute
