@Rafael96 Your first step would be to notify your bank and tell them that the charge was unauthorized and to cancel the cards and get a new one. If your bank does not reverse the charge, then contact Airbnb.
Your next step would be to check all your account settings: email, notifications, payment method and most importantly check the box for login notification under Security. (If anyone is logged in on a device or location that is not you, log them out.) Then change your Airbnb password and your email password.