India Post — i am not able to know my current status of a consignment dispatched, through india post it is been 20 days now

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

My consignment which was bound for la, usa cannot be tracked any further as informed by the india post customer care. The consignment number is re[protected]in, it has been now well over 15 days and is a time sensitive document. It is a matter of serious urgency.
This service is highly inconvenient, what is the purpose of tracking setup if one cannot track the post, moreover the delays in between show very poorly on the service. The customer care is not supportive and the whole system needs to improvise a lot especially on it's credibility.

Thanks