I ordered the iphone 6 plus, and I have not received an email.
It takes time to receive the confirmation email. Especially right now with the high volume of iPhones being ordered. Got my confirmation 1 hour after I ordered. You should get it no longer then 24 hours
When you completed your transaction you should have been prompted to a page that said "Thank you for your Order" following by a confirmation #. Did you take time to write it down?