DTDC Courier & Cargo — Unprofessional Approach and No responsibility

Dear Sir, Madam,
I am using an important medical device for my day to day activities, and the respiratory care center in Bangalore has sent my medical device via DTDC courier on 13th of November to Kerala in my address. After waiting for 10+ days, I have not received my device and hence asked them to track the details. I have got the tracking number, and then realized that the local DTDC office in North Paravur sent that back to origin by saying the location is not serviceable. I have not received any calls regarding my parcel from DTDC office. As per origin location, they have taken my phone number to contact locally. Then I called the local office, they are not taking responsibility of informing the customer regarding the parcel. I explained the same with customer care executive, he has asked me to talk to Origin location and they are not responsible for resolving any of these issues. Both the DTDC office staffs or customer care execs are not taking responsibilities and now my parcel is nowhere. I have checked my location pincode in DTDC customer care system and found that it is a serviceable location. May I know how we can get this resolved. It is staying at Frazer town Bangalore DTDC office. The medical equipment is very much important for my day to day activities. Tracking number is B74392949.