For some reason , Makjagers's PIIC grau mod looked very very dark (almost black) in-game on my PC.
I've done a lighter version for my own use (i didn't change anything else). If the author permits i can send it to anyone who has the same problem.
Personnaly (i live in Europe but preordered through BFC) i think one week or two doens't make such a big diffrence, knowing that the game's life will be 2 years or so.
I had the same problem, and i received an instant response to my e-mail ; they said they correctly received my pre-order (i had kept the number).
So you're probably okay i'd say but try again normally the support is reponsive.