Sunflame Enterprises — 4-burner classic glass top burner

I have purchased a glass top - 4 burner classic gas stove of serial number 16b00 4716 on 24th of march 2017 from nandi charan paul (Agency) kolkata. The flame of alll the 4 burners of the gas stove automatically went so much slow in just 10 days of the purchase that cooking has become impossible on it. The flame which comes out of all the four burner is negligible. I have called men from your customer service center thrice but it goes same in just 2-3 days after their repair. They have opened and cleaned all the pipes and burner but it again goes same in some time. I have asked them to replace the product but of no use. Kindly please look into the matter and replace the product as early as possible as it is under warranty. Waiting for your reply. Puja jalan [protected]@rediffmail.com