Godrej Microwave Oven — misbehave of customer care and lying about my amc

Customer care called and told to extend my amc as my warranty period will be over this month. But i found out later it will be over in december. They told that they will be sending a mechanic to solve my pre heat problem. But the person who visited was not a mechanic but a amc dealer. Then she again called me and misbehaved with me. Godrej should take care of it.