TTK Prestige — Service of 4 burner gas stove duplex dgs

I had bought 40257 model 4 burner gas stove on June 22, 2022 in Chennai. It is well within warranty. Two of my burners are not working. I have raised complaints with prestige call center many times. I was given phone number of a service center in Chennai. I have called that number many times but noone picks it. It is highly frustrating since the issue has still not been resolved. I never expected Prestige will have such a poor customer service.