Unfortunately not. Our store till systems are not able to process refunds via PayPal, however you can return to store for free for a refund to the linked bank card.
If you used PayPal Pay in 3, as you won't receive the refund to your PayPal account in store, you will need to use some of the refund back to your bank card to pay any remaining PayPal balance.
You can also use our returns options to return your order via our Warehouse for a full refund back to your PayPal account, see here for more info on those options.