Jet Airways — boarded phtaseenger not accomodated in flight

I have taken boarding pass for flight 9W0549 on 10/04/2015 from Dammam to Mangalore., The gate mentioned for boarding was gate 21. I waited up to 03.00 A.M.for boarding and no response from the counter. Again I checked after 10 minutes and came to knew that flight already departed from gate 25. I am on an emergency vacation and the response from your staff was very poor. Your staff informed at 6.00 am that my lugages already left with the flight, but till now I have not received any information about my next flight to mangalore. Passenger Name: mohan Kumar Sivaraman K Airline Reference :QLVFHP Class: ECONOMY Ticket No.[protected] Waiting for your immediate response