TTK Prestige — gas stove burner proper not working & company service is not good.

We have purchased four burner gas stove from prestige company in october 2019 but till now its burner is not proper working. I ragistered two time complaint in customer care. Company's technician also has come our home for repair. But its burner worked temporary proper. Then i complaint third times online portal for repairing on 10 june 2020, my complaint no. Is hary1423799. Company's technician not come our home. I called three time customer care but they always replied technician will come your home shortly and no one technician has come. So this is worst company, technician also not proper repair & service is not good. I purchased gas stove in hope that prestige is best company but is not good