Blue Dart Express — delivered to wrong address though sent under critical express doc no [protected]

Address:

Jorhat, Assam, 785001

Sir, /Madam, My document no[protected](critical document) sent under critical express category was delivered to wrong person and at the wrong address. The delivery boy never gave a call before delivering the document nor did he inquire about the addressee. What is the importance of taking the mobile numbers then? Reputed courier like Blart Dart is never expected to deal with a critical express document so carelessly and haress the customer.