India Post — Speed post not received and untraceable

My speed post consignment no. ED[protected]IN booked from sec 7 rohini delhi Post office was sent to Tilak Nagar Mumbai 400089 on 17 Jun21 and as per tracking status it is recvd on 21 Jun 21 at Tilak Nagar s.o Mumbai but the item was not recvd at the post office neither they hve confirmed any receipt of said consignment. Now the item is untraceable. Plz help as it contains official documents.