Please be patient when posting in the forums, we cannot respond to all issues straight away. We are a small team and we have to split our time between forum/email support and fixing bugs.
Issues to do with bonus codes are being handled by firstname.lastname@example.org
if you send them an email and explain the situation, they will sort things out for you. Please include the in-game usernames of your friends in the email and/or get your friends to email instead saying that you referred them.
It may take some time before you get a response, but emails are checked daily and we usually respond within 24 hours.