Jet Airways — didn't allow us to board the flight

Address:

Kolkata, West Bengal, 700016

Dear sir

This is to inform you that, i am a jet privilege member. On 22 january 2018, i need to go to delhi for an urgent work, with my wife.
We enter the kolkata airport terminal at around 1:30 pm and took the boarding pass to delhi via lucknow (9w0771 and 9w0827).
After collecting the boarding pass we move to gate no 23 for boarding via security check at around 2:15 pm.
And we reached the boarding gate at around 2:25pm. At that that they have closed the gate and not allowing as to board the flight at kolkata.
We request many time and he keeps on engaging us in talks and kills times instead we have boarding pass.
Then they have taken as to jet airways incharge person, he didn't bother to listen to us neither offer us alternative.
I am sorry to say the jet airways staff has harassed us. We were help less.

We miss our flight because of them.

Later we have to purchase a high rated ticket on the same day for delhi by air india flight (Flight-ai701).

I am very much harassed and disappointed