India Post — no tracking details available from indian speed post to usa

Address:

Kolkata, West Bengal, 700047

I have sent a document to a university in usa. I used indian speed post ems with the tracking number ew[protected]in on 18/11/2017 but still there has been no update in the tracking details. It is showing received from customer still after 4 days. It is supposed to reach within 4-7 days. This is very important for my career that it reaches by 1st december. I have registered a complaint also but it is still pending. None is telling me what is actually happening, is it just a update issue or still my parcel is present in the post office only.