Boat — Boat service team damaged my product

I bought a boat speaker 1000from flipkart and after two or three months it is giving me Bluetooth connectivity problem due to which i raised a complaint to boat then he picked up my product to the service team abd after one they send me mail that there is a internal part missing due to which we are unable to help you. But when product back to me then the product was totally damaged it is not working and also button are not available there. So i would like to request to higher authority please look into this matter and resolve this asap. Otherwise i have to take strict action against the company