This is the same refund rule printed on the store receipt.
Time limit
Refunds are available within 24 hours of purchase only.
Condition
Return the item in the same condition you received it.
In the store
Bring the receipt. A refund restocks the item and pays you back. An exchange restocks the item and puts that amount as credit toward a replacement.
Online orders
Contact support within 24 hours of the purchase with your order number. Support confirms the return before a refund is sent.