Even if you mark it as dispatched, you won't get the funds for at least 48 hours AFTER confirmation of it being delivered. If you didn't send it via a tracked method, then you will have to wait 14 days.
If it was Simple Delivery and you used your own label, there is no way to mark as despatched or add the new tracking number (if you have one). Unfortunately, that means a 14 day wait for your payout.