Jet Airways — Boarding Related And Miss of flight

I had my flight from Mumbai to Bangalore 17th Oct 2015 PNR: IHZGUC by 3:05 . I was at boarding Gate 28minute prior I.e 2:37 or before .. they said me gates r closed .. Wat was that I really didn't expected.. They answered me paperwork and everything is done .. I regularly travel with Jet .. but this moment for me was un expected from jet.. they didn't tried anything .. nor they gave me any concern person contact whom I can talk .. They asked me to go to cancellation desk and cancel the ticket .. and the amount m getting refund is just tax amount.. I want my full amount Refund for the Flight .. I need to talk to som1 who Handel my case .. I Had my exam by 7 am for which m Gonna suffer ... For the thing happened to me .. Regards Darshit Bakraniya [protected]/[protected]