DTDC Courier & Cargo — Tracking number invalid , have not received the courier

Address:

No 9, Eighth Street, Nalmeiper nagar, Tirunelveli-627358,

I was sent a package from Kolkata to Tirunelveli in Tamilnadu. I have not received the package and unable to track the same for more than 7 days . Customer care is some time too responsible and simply cut the call, saying unable to track.my tracking number was G78967947.Please take necessary steps to deliver the package or provide update atleast on status