DTDC Courier & Cargo — courier non delivery

DTDC promised to deliver the courier before 5pm on 22/10/2018. it was a very urgent document to be delivered on time. However, the status is showing 'Receiver not available (cir)' where as the staff was available. I tried calling DTDC customer care but no body picks up the phone. My mobile number and mobile number of the receiver are written on the envelop, the delivery person did not call to verify. Extremely disappointed at the DTDC service.