Theft in train

I was travelling by 12137 on 7th may 2017 from Bti to Bhopal when my compartment was looted. Someone broke the chain i had tied my luggage with and took my bag which had important documents and goods worth INR 20,000. I had lodged an FIR but till now, no action has been taken neither by Delhi Police nor by Government Railway Police, New Delhi. Kindly look into the matter