The seller will have received a defect on there account for being out of stock and not supplying you with the items you won,as ebay like sellers to keep on top of there supplies at all times, and do penalise them when they can't supply due to out of stock.
I'm afraid you can't name and shame on any of the ebay boards,and may find the mods edit your post 😉
If you leave the seller feedback, keep it short,so along the lines of "Seller failed to supply the goods" so it doesn't breach any feedback policies and gets removed.
________________________________________________________________
"The secret of getting ahead is making a start"