Bought a pure flames 703 BR hob from BISMI SHOP KALAMASSERY. The hob is 4 years old. The big burner is not at all functioning now. Reigistered complaint at BISMI . An executive named Rahul visited and he said he ordered the big burner. But it has not reached even after 1 month. he is not answering calls also. Dont know what to do? Please advise. Very Poor customer care.