Spice Jet Airlines — Done fraud with me!

I have booked my ticket on the Spicejet website for 6th Dec from JSG-BOM(Jharsugda-Kolkata-Bombay) which was scheduled at 4:40 PM.
I reached the airport at exact 3:40 PM as I thought everything was done online, the only thing left was boarding. But when I reached the airport the staff members didn't allow me to board and gave me the reason that the luggage truck has already been loaded, So I told them I Will leave my belongings outside and let me board then. But then also they told me it's too late, they can't make me board when I was able to see that plane was standing still at the airport.

But then they told me that I can take the next flight to Bombay and gave me a new ticket at 4:56 PM of the flight whose timing was 5:50 PM.

They didn't allow me to board my previous flight just because I reached only 1 hour earlier but they are giving me a ticket for a flight which will take off within an hour and allowed me to take my luggage also. If they would have wanted they could have easily let me board my 1st flight only. Just because they wanted more money they didn't allow me and gave me a new ticket worth Rs.15, 274.

When I told all this to the staff they told me these are the protocols and went inside the airport. I was helpless and also in need, so I cooperated.

Below are the tickets of my 1st and 2nd flight with booking timings.

Need Justice on this

NOTE:- SpiceJet website doesn't have a complaint or suggestion area even.