DTDC — Irresponsible staff, non delivery of courier

I have sent some important document through DTDC courier service vide consignment no z68261980 from jaisalmer on 28/08/08 to N Delhi.
The courier has not reached till date i.e 2000 on 02/09/08. I have been contacting through STD since yesterday to your CP office and Parliament street office
on tele no 30480538, 23342627, 23743263. There is no positive response. No one is responsible enough to give a feedback atleast. The addressee’s telephone and mobile no is included in the address of the courier, but in vain. The addressee is ensuring availability of at least one member in the house awaiting the courier. I am surprised that in this age of technology and competition, a private courier is operating so irresponsibly in our nation’s capital city, Delhi. Jaisalmer and delhi is connected by overnight train but still I fail to understand a delay of 5 days.