Air India Express — Missing of flight

Address:

Navsari, Gujarat, 396321

Out air india express flight ix-251 was booked for two person (Confirmation number 2qmd99) from mumbai international airport on 28th april 2016 schedule departure at 23:40 for sharjah.
We checked in well before departure time & got boarding pass too but as there was too long queue at immigration check & it took more than one hour. We request the security persons deputed there to gave us priority as our departure time was coming near but no one listened to us. Also, no phone calls or announcement was made to us & while our turn came, the immigration person told that your flight has gone.
We were going there to do the porter job just to earn money & we know how we collected money to go there & we lost everything.
There was no one from air india express officer to listen to us.