I preordered Heavensguard and haven't received the preorder code

[CherryCola]

Have you tried looking in your orders, clicking the View button and then following the instructions from there on the SE store?

There should be a button that says activate product key or something similar on the view page.

[Allegrian]

There's no button or anything like that. In this forum a mod posted that I'll receive a mail with the preorder code 30 mintues after preordering it, but it has been an hour and no mail.