If your order has been placed within the hour, you can send an e-mail to firstname.lastname@example.org. We will cancel your order and proceed to your refund (which will appear on your bank account after a couple of days).
If your order was placed more than 24 hours ago (except for pre-order models), we can not guarantee the possibility of canceling it. It is very likely that your order has already been shipped.
In this case, you can contact us at email@example.com to ask for a return.