Getting a fine is, of course, unpleasant. Fines, however, are not issued by 4411, but by the entity that manages the parking spaces where you parked your car.
You can, however, consult your performed sessions via your 4411 account on the website as well as in the 4411 app. You can view there whether the vehicle registration number, time and parking zone are correct. Contact the entity that has issued the fine if you have any questions or comments.