[Filament]

I’m hoping to to get MacBook Pro refunded or similar so I can sell it. I see refunders completing Currys PayPal refunds all the time. Are the boxing them to get the refund done? I can’t seem to find the method to get it completed.

Most likely boxing/ FTID.
But I doubt any refunding service provider will just go and tell you exactly how they do it. Maybe if you SE your way and become good friends with the refunder. They have experience and figured out what works. I'm sure you can find others that have had success if you scour the net enough.