India Post — "Item Delivery Confirmed" status without item being delivered EK[protected]IN

The tracking details for EK[protected]IN shows "Item Delivery Confirmed". But the recipient nor the family members never got the package. It was not even delivered to the guards neither to any other flats in the society. The postman also did not care to call me if he was not able to locate.

This was an RC book (Govt. Document) that was sent by the KR Puram RTO Bangalore.

Also as per the portal, the responsible delivery post office pincode is 560066, but the delivery location is showing as Bengaluru G.P.O. pincode 560001. This is really absurd while delivering a government document.

Please tell me the current location of the parcel and how can I collect it