You still have most of those Crowns on your account. To check your balance you can open the Character panel by pressing C when you're not in a duel. In the bottom left hand corner of that screen you will see your current Crowns balance. If it says N/A log out and log back in again, then check the balance again. If it still says N/A it could just mean that the game is unable to get your balance right now, so wait a few minutes and check again. If it always says N/A you need to contact Mr Lincoln to find out what's going on. To do this, click the Help & Support tab on the left.