22-05-2016 9:11 AM
You can ask her to give it a bit longer in case it's delayed in the post, also to check outside the house and with neighbours as parcels are sometimes left without a card being put through the door.
If it still doesn't arrive you have to refund her in full and then clain whatever compensation is available from Royal Mail.
Don't ask her to wait too long as eBay allows buyers to open a case against the seller under their money back guarantree just one day after the latest estimated delivery date.