SkyKing — Parcel not delivered

Address:	Kolkata, West Bengal, 700007
Website:	skyking.co

My parents sent medicine from Dubrajpur (West Bengal) to Bangalore from this courier service. The parcel was received on 18th April in Bangalore, but still it has not been delivered to me. We have tried following up multiple times, but nothing has been done yet.
Everytime we called the customer care they cook up with some new stories.
Sometime they say that phone the courier guy called but I didn't pick call. HOwever I necer received any call.
Other time they say that nobody was at home which is again false.
Contrary to all these, once they told that the area was out of their service zone. Plz help, as the parcel has important medicines which I really need.