India Post — Speed Post Consignment EM[protected]IN not delivered

Address: 431517

I am satish waykar. I have posted my important document through speed post on 3 April 2017 from Medical college S O Ambajogai 431517 to Mantralaya S O Mumbai 400032.
Consignment Number of above speed post is EM[protected]IN. Tracking information shows Item dispached to NSH Aurangabad from ICH Parbhani on 4 April 2017
After that they won't update information and Parcel is not received by Mantralaya S O Mumbai as I have checked

Sir, I sir sincerely request you to resolve my complaint as it contain my confidential educational certificates.