Buyer requseted a return - But he hasn't got the order yet(Still in-transit)

[warla-4132]

How can I handle this return requset🙄

[warla-4132]

The estimated dilivery date for this order does not appear on ebay(No estimate availabale). I've also used my order processing time for 20 days.
Ordered date : May 04, 2020
Order Shipped : May 05, 2020
(Tracking details available)
Tracking status : Airline departure from original country)

[simba6]

Send them a prepaid return label.