DTDC Courier & Cargo — dtdc irresponsible delivery service. could not deliver a 10 grams package!

Address:

Bangalore Urban, Karnataka

The delivery agent has not tried calling me, instead agents bluffing that they have tried reaching me which is not for sure done. I have raised a complaint and after 3 days of raining and my followups they are saying they cannot do anything. When i ask why agents cutting the call. Is this the way you people respond to customers.
The package is hardly some 30 grams.
Minimum they should have called me when they are returning the package back. They didn't call when they are trying to deliver nor when they are returning. Now the only i answer i get is they cannot do anything.