TTK Prestige — cooktop service

I bought prestige cook top gt 03 from saravana stores in chromepet. There was some draw backs in the product. So i approached the customer care st tambaram. The service person attended the oroblem in a hasty way. He is not in the position to hear the problem. The problem was not solved. He never had any solution.
I bought the product on april 8th. The stove stands are too shaking. While switching off the stove mild bursting sound heard. The knob had broken within 15days. Please take some steps to solve my problem. I will be thankful to you.