You should get an email to the address you used - was there possibly an error in the email address you used when you purchased?
You won't be able to get a second email confirmation.
If you message the seller from this account, they won't be able to connect your username with the purchase you made as a guest.
Is there an issue with your purchase?
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
