Blue Dart Express — parcel not delivered - bad customer service

Hi,
I gifted someone in delhi which was sent by stalk buy love through your service. I got a message that the parcel is delivered but on confirmation from her, she told me the courier guy called for particulars but didnt deliver it.
This happened last saturday. I waited 3 working days, in case package is with you but it is still not delivered, dont know where ur guy threw it but i need it delivered as soon as possible or i have to take a legal action against such complacent behaviour.
Awb no. Of courier: [protected]