You cannot now add any new tracking, eBay suggest sending the buyer a message with those tracking details. If a case is opened later for item not received, you will be able to add those tracking details.
A refund is sent to whoever paid for the SD label:
- If you selected 'Buyer pays’ when you created the listing, your buyer will automatically be refunded for any Simple Delivery label that isn’t used after 30 days
- If you selected ‘Seller pays’ and offered free postage on your listing, you'll need to fill out the Request a refund for Simple Delivery form for the label that wasn’t used. Make sure to send your request within 14 days of your item selling.
@es-2681