To receive assistance with support for in-game or web service issues, please email support@playboundless.com. You can search a backlog of topics to see if other players are also experiencing the same problem below.
I use paypal and my emails used to go to the email associated with it. But they have since started sending my codes to the email associated to my Boundless account. So if you Boundless account email is different than your payment source check the other E-mail.