AAI, Indore Airport — parking fee charged for waiting in queue

We had come to pick up my sister and were given a pass. The in time was 9.42. We picked her up and found a long queue on our way to exit. Because of the time in queue, we got 3 minutes late when we reached the counter. We were charged 55 rupees for that! This is totally unfair! The long queue was not our fault.in fact, we didn't even spend even 5 minutes to pick up my sister. The counter guy was rude and disrespectful to us when we queried about being charged unnecessarily.
What kind of rule is this? If you need to levy a fee, be open about it. This kind of rules only serves the purpose of irking customers. At least, during long queue time, consider the waiting time while charging the fee.