wrong email problem (purchase not space dock)

due to foolishness on my part i accidently mis-spelt my email when buying the game, so when it came to downloading the game (GalcivII) there was the problem of the serial code, which i have, being registered to the wrong email address. so obviously i cant do anything with the game untill the code is re registered with the right email address. cant find any way of contacting customer support or anything any chance someone could get in contact with me,
cheers