If you sent using a tracked service (Large Letters over 100g and all parcels have a 'tracking number') and added the tracking when you sent the item, does the tracking on Royal Mail now show as delivered?
If tracking shows delivered on the RM website, MORE THAN 48 HOURS AGO then you can contact Customer Services and ask them to release your money.
If there is no tracking at all, you will be paid 14 days after the transaction, as shown in Ebay's new payment arrangements.
You cannot update the status to delivered.
If the item was under £10, Ebay will pay you 24 hours after you receive positive feedback.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)