Indigo Airlines — Caring a senior citizen

Address:

Visakhapatnam, Andhra Pradesh, 530003

Hello there
my mother traveled from hyd to vtz on 27 feb'16(4:50 pm flight). we booked her ticket(thru mobile app) which had an offer of free meal that day. she got it and satisfied.
now my issue is with the seating system. she is an 80yr old women. while check in we requested for front row(we already paid extra for that row), ur ground staff said all are booked.
then later when the flight doors closed 2 seats were empty. we were in second row and observing. then from some where one passenger comes and occupies the empty seat...Ur staff says nothing.
as an educated person i am informing u people. making a mess is easy but i hope from now on atleast Ur whole staff everyone will give optimum priority to senior citizens seating.
PLZ DO NOT BLOCK SEATS FOR UNNECESSARY REASONS. KEEP CUSTOMERS INFORMED CORRECTLY.