Indian Passport

I sent my passport to CKGS, Chicago for renewal and they have lost my passport. I don't know what to do. I sent them my old passport along with a return shipper from USPS. They processed my application and updated the status to Returned via USPS. They also updated the AWB number in the website for tracking the shipment. When I tried to track my passport using that number, it did not work. I called USPS and found that the tracking number given by CKGS was not a valid tracking number. I now don't know what to do. CKGS keeps asking me to contact USPS and USPS cannot track the passport because it does not have a valid tracking number. I AM TALKING ABOUT MY PASSPORT, DAMN IT!. CKGS is irresponsible and I don't know what to do now. Please help!