Jet Airways — lost baggage, no response

Address:

Mumbai City, Maharashtra, 400099

I traveled from USA to India through DELTA (ATL-LHR) and JET (LHR-BOM). JEt airways guys lost my baggage somewhere. After waiting for 1 hour on belt, when I went to concerned person, I am told that they already know my bag is left in london and they guarantee to delivery my bag to my door step within 24 hours.
This is third day and I am still waiting for my bag. I have not got any single call from JET AIRWAYS telling me status of my bag. I am calling them everyday and after waiting for 20-25mins in the queue, person tells me that tomorrow I will get it. This is happening everyday. I don't think they are even considering returning my bag.
Given 3 days, I have lost some business due to some documents in the bag. I am having so many problems without my baggage and these guys are harassing me everyday on phone. JET AIRWAYS should be slapped with an investigation and such companies should be restricted by government putting hefty fine, for harassing their customers.
PIR - BOM9w35580