Pigeon Appliances / Stovekraft — gas stove burner is not properly working

I had purchase 3 burner gas stove from steel emporim Raipur chhatisgarh on nov 2016, from last six month the burner is not working properly. I have complained in toll free number on sep 2017 and they said the burner is in guaranty peroid and they send the company Engg. and he will also told us that the burner will be replace as it is in guaranty peroid and after some time when we cll him he told us that burner will be send by company I will temporary repair the same but till date the burner is not replaced and we are facing difficulty during cooking.