NO rewards plus need acc name change
I haven't got any of the rewards and ive owned this game well over a year now I believe plus I'd like to change my account name.
What rewards are you talking about? If you're referring the special items for Alpha backers, those won't be available until Beta.
Email firstname.lastname@example.org and they can help you.
By the way, this forum is for bug reports, not support questions.
February 6th the game releases on steam, all owners of the alpha get a steam key, so after that day your display name will probably be your steam name.