12-01-2018 2:43 PM
There is nothing you can do. Ebay do not get involved in postage issues.
You can ask the seller to refund the money but he doesn't have to and he is unlikely to volunteer as he was dishonest in the first place.
What you SHOULD have done, is refused the parcel, and then made a claim for "not received" via ebays money back guarantee, and got a refund.