For Nobilis version is usualy this support email valid (but still check either your confirmation email - if you downloaded it, or your box / paper manual if you purchased boxed version)
support.eurogamer@gamesplanet.com
Why it is so important to check your manual/box/email? - In my email is literaly written that I would need to add my order number - as reference (they won't support much if they don't know that your product is really from them
- and your order number confirms exactly this)