DTDC Courier & Cargo — Parcel not delivered/Returned

Address:

DTDC Couriers, 53, 9th Cross Rd, B Block, Shakambari Nagar, 1st Phase, J. P. Nagar, Bengaluru, Karnataka 560078

My consignment number is :- B76009649
Status :- RTO
Item is UKULELE(Musical Instrument/ rs: 4000 INR)
It was booked on, they did not deliver it stating the wrong address. The address is my residential address in Kolkata which is very much valid as tons of parcels come on a monthly basis from different courier. And also Two of my mobile numbers were given to them no one called me either.
Isn't it their responsibility to call the recipient before delivery.?
However it is returned to origin now. 500 rs was paid nothing happened.
I have tried lots of phone calls, twitter posts to reach them no one gives a proper reply so basically my parcel is stuck in bangalore and they dont care at all. Such redicoulous service. Now When I called the contact person, he said i have to pay 500 more for re-delivery, but it was not my mistake, it is done by DTDC.
I am also covid positive now and cant fight with them.
It is my humble request to you all please help me get my return before i die in covid(If i die)