Jet Airways — penalty was charged for my whole family unnecessarily during my travel to mumbai

Address:

Mumbai City, Maharashtra

I travelled from chennai to mumbai with my family (Total of 10 o[censored]s) using jet airways on 1st feb 2019. I doont have any issue with traveling on that day.
But my return was on 5th feb 2019 from mumbai chatrapati shivaji terminal 2 airport to chennai was unpleasant as we were charged penalty for the return flight as 2100 rupees for each o[censored]s. (Total paid is 21000 rupees)

The return flight was scheduled at 9.40am but we all reached at check-in counter at 9.15am after the flight assistant asked us check with a few of the assistant at airport and we were wasted like almost 10 minutes on that day.

On that day we already made online check in before reaching the airport.
But it seems like due to lack of assistance from the jet airways assistant then we were charged penalty unnecessarily and asked to took next flight where we have waited for another 3 to 4hrs in the airport.

My whole family flight booking details as below:
Booking reference amadeus pnr : ptgyvi airline pnr : 9w cuadjo
(I have attached one of booking details as proof)

I felt the jet airways counter service or the assistant staff should let us to board in the same flight and arranged our luggage to deliver on the next flight with free of charges but on that day i paid 21000 rupees for 10 o[censored]s (2100 x 10 o[censored]s so the total is 21000 rupees) for nothing.

I really not happy with the way they handled us as they don't even offered a good service/solution and helped us on that day but instead i felt there just charged us the penalty with unnecessarily.

I hope you can help to investigate my complain on behalf of my whole family and hope my whole family can get the penalty refund that charged by the jet airways.

You may contact me via my email address : [protected]@yahoo.com

Looking forward a good news reply from you.

Thank you.