Because Aliens. But kidding aside, you need to submit a support ticket through Helpshift by tapping on the "?" in the game. Since the game is currently down for maintenance you will need to wait until the game comes back up in 3-4 hours.
Have you submitted a support ticket for this issue yet? If not, please do so that we may look into it for you. http://www.ciegames.com/racing-rivals/support