If you paid via Apple Pay or PayPal, please check the email address associated with your Apple Pay / PayPal account as this is most likely where your confirmation email was sent to.
If the email address that you entered at check out is correct, please check your junk and spam folders. If it's still not received after 4 hours of placing your order, please use the CONTACT US section and provide us the order details so we can look into this for you.