Refunds cannot be given for digital goods such as ebooks and audiobooks. If you accidentally bought a book twice or purchased the wrong book, you can email me at firstname.lastname@example.org and I'd be happy to give you a store credit or exchange.
For physical items, there is a 7 day return policy if the item is faulty or damaged - not if you change your mind. Please email email@example.com and include your name, proof of purchase and reason for return. After 7 days, unfortunately we are unable to offer returns.