Prestige — hobtop 3 burner not working

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Ttk prestige

My prestige hobtop 3 burner is not working for the past 4 months. I registered more than 5 complaints & nobody ever attended. Everyday its a pain to call & find out the status. They keep diverting me to different numbers. Mr prabhakar assured me to attend the issue 3 days back. But still i have'nt got any call. Then i approached mr lenin & he gave the same assurance. But again no one attended. And everytime my complaint automatically gets cancelled. What am i to do with this faulty gas stove? Where can i escalte this issue? I am been continuously fooled by this so called reputed company. Very disappointed with prestige product & service