DTDC Courier & Cargo — Courier not reached destination.

Courier not received . Booked at Nandyal (AP). Supposed to reach Pavagada (Karnataka). But courier was sent back by Chamarajpet Bangalore DTDC. to Nandyal without sending to Pavagada. Very important documents are there in the cover and I was in urgent need. Till now I do not know the whereabouts of the cover. Very poor response from customer care. It is for name sake.