as courier attempted delivery disgusting
I entirely agree. But it's what you accepted in the user agreement, that eBay's definition of "successful delivery" treats even attempted delivery as being successfully delivered. Although it was self-evidently was not delivered.
This is a perfect illustration of how eBay has become literally a law unto itself. But it gets away with it because a) in accepting the user agreement we have agreed to accept its policies and decisions, and b) eBay's organisation is structured in such a way that it is unregulated, i.e. not answerable to the Financial Conduct Authority.
We don't know how and when you paid. If by PayPal and within the last 30 days, you may still be able to use PayPal's buyer protection policy. Or if by credit or debit card your card issuer may be able to help. Both PayPal and any card issuer would require evidence of actual delivery, not just that delivery was attempted.
If this was a UK business seller and there's enough money involved to be worth taking it to court, remember that the law requires business sellers to ensure successful delivery. You didn't buy the item from eBay, you bought it from the seller, and the seller is almost certainly liable to you for the delivery failure. Consult a solicitor or see Citizens Advice first.
