Air India — loss of luggage

This is regarding my lost luggage from mumbai. I boarded flight no 144 from coimbatore to mumbai on 4th march and to delhi by flight no659. Iwas informed at delhi that my luggage is still at mumbai. I am a defence person on official duty to pathankod. I could not proceed further without my baggage, and had to stay in delhi for two days on my own expence. Air india promised to deliver it within 24 hrs. Its been 4 days and no action has been taken yet. Very irresponsible staff. Plase take some action fast.