Micromax Informatics — not receiving good service after sell the product

Sir, i have registered a complain on 12th july 2017 and the technician took the parts of my led tv on 15th july. After that they are telling that new parts is to be replaced but it has been 2 weeks and neither they have replaced the new parts nor they are giving the old parts back. I have called the local service centre no. [protected] but they are always telling it will come tomorrow. Six days approx. I have called but same answer "it will come tomorrow". Please sir i request you to take necessary actions as i want to resolve as soon as possible that is to repair my led tv