Chennai Airport — parking exit late by 12 sec

Address:

Chennai, Tamil Nadu

I came to chennai by ai906 flight. Rental car i booked. Which entered parking at 05:37:04. There was delay at the entrance parking area and we exit at 05:47:16 hrs. Extra by 12 seconds.
We paid 150 rupees exit charge. Person not accept any reasons for late and of course 12 seconds can't be late. If atleast calculated in one minute basis, whatever charge payable is justified. But this is exploiting money from people.
Kindly make this system as per minute payment as this activities can't be as per second.
Receipt no 720217 and vehicle no : 9963