India Post — Important and urgent Speed post not reached and tracking stopped

Address:

New Delhi, Delhi

My CSIR NET rank certificate was posted from New Delhi post office by speed post on 21.08.2015 by CSIR. I went to delhi on 26th and came to know that it has been posted (to kolkata which is my home) and got the speed post number ED[protected]IN .But tracking it I saw that it was despatched to mumbai and then delhi from kolkata airport instead of reaching my home. After 25th it was not being tracked and today showing timeout .The NET rank card is very important and urgent for me.Now I dont know what to do, where to go.Feeling helpless and hopeless.I have to submit the rank card september to the instituion where I have admitted to PhD, otherwise my admission will be cancelled, Please do help me.It is a serious question of my career. Anyhow I have to get my rank card.I dont know if it is returned to CSIR office, if that, then also it will be delayed.