Philips India — Led tv

I got a 32 inch philips led tv. I had a issue with the videocon d2h inbuilt modem. I have paid service charge 850 and delivery charges. After 15 days they asked to change motherboard, so i have paid the mother board cost around 8000. After changing motherboard sound was not coming on tv. After calling many times one technician came and taken the new motherboard stating that new board has some issues. I am waiting for 3 weeks, called many times to philips customer-care and service centre but no one is updating regarding the motherboard.