DTDC Courier & Cargo — package not delivered since two weeks

Address:

Chennai, Tamil Nadu, 600097

A packet containing homeopathy medicines was sent from visakhapatnam on 28th october 2017. It was supposed to be delivered before 31st october as per dtdc. Till date, i have not received the package. I’ve tried calling their chennai helpdesk but no one picks the call.
I’ve tried to chase them on twitter and messenger too. The only response i get since the last 3 days is that they are investigating it.
No eta has been provided. No proper response. Only after tagging consumer forum in the tweets did i get a response from them, saying that they will look into the matter.
No response yet to the mail dropped to their helpdesk (Attached here).