Prestige — Complaint against harassment of after sales service

Address:

Kolkata, West Bengal

model no-GTM 02 SS.Name-prestige gas stove marvel two burner.
Bought from hiramoti electron on 23/12/2013.24 months warranty.
bill to my name-Sarthak das..address and phone number given.
gas leaking from the gas tube connector, chances of fire.no problem with pipe, but at the point of connection to the oven.
already registered a complaint on 10th of july, 2014.complaint no-KOLK461880.called customer care on 18th july, 19th july twice.still no technician attended..though the technician was to reach everyday I called, as guaranteed by the customer care executives-miss saundariya, miss shraddha etc.as u can see from my email, i am quite harassed by the after sales support of your company and quitedisgusted.can i expect a technician soon?10 days for sales support to arrive from the same city is not appreciable at all!!!
sent this mail to prestige ttk national service manager thrice, no reply.tried to register an online complaint, tried 10, 11 times..showing an error and cannot register complaint.i have all the required documents like purchase bill and guarantee card.
can any one give any idea as how to approach to consumer court?i am from kolkata.