The Professional Couriers — Did not receive my parcel and has been delivered somewhere

Address:

Alpine block-B, Room no.1702, Greenage apartments, Salapuria sattava, Next to Oxford College, 7, House road, Bommanahalli, Bengaluru, Karnataka ,56006

My courier (id:MLR[protected] containing important documents sent by The Examination Section of NITTE University, K.S Hegde Medical Academy, Mangaluru on 29/08/2022 via professional couriers to me at Greenage salapuria apartments, Next to The Oxford college of Engineering, Alpine B block, Apartment no.AB. 1702, 17th floor, 7, Hosur Rd, Bengaluru, has still not been delivered. On enquiring with the sender's and receiving the tracking id and checking, I found that my parcel has been designated as delivered on 30/08/2022. I checked with my security and nearby apartments to see if any parcel was received but no parcel was delivered.
I called up the courier service in Mangalore, later Bangalore and was finally given a number of the manager, one Mr.Ganesh who showed no interest and asked me to WhatsApp him the tracking id and my address.
After that no response or reply. I called him and he is not picking.
Kindly help as the parcel contains important documents.