Lloyd — theft of ac sensor, wires, screws by service representative

We had a complaint in ac outdoor unit board at my home. We had purchased the ac from oxygen digital shop at kottayam, kerala and one of their representative came here to install the ac and the same person came here for the service. After his examination he told us that the outdoor unit board need to be changed and he told it costs rs. 9000. We told him not to change the board for the time being. Later on we have contacted lloyd company service center at kottayam directly and one person came to our home and checked the ac. He then told us that the board is still under warranty and he ordered the board from lloyd and then he came to us with the new board to install. When he was trying to install the new board he told us that the sensors, some wires, and screws are missing. We then tried to contact oxygen digital shop to report this theft. All these are happening since 6 months and no action taken yet. We need an immediate solution.