India Post — international registered post

This is regarding the last update of consignment no. Rk[protected]in which was on 3rd october from mumbai airport sorting office. The document is supposed to reach before the deadline and it is very very urgent. Today is 22 october 2018, and i see no further update on its delivery status. Today i also called at customer care and the call center executive said that they cannot provide any further details beyond after "otb". I have no idea whether my mail has been delivered or not! I cannot afford to miss the deadline and feeling restless.