Indian Post Office — No updates on my parcel

Address:

Vaivakawn, Hunthar Peng

A parcel has been sent to me from Punjab to Aizawl on 16th of August. The last update as per the tracking in India post site is 22.d August, 2021 which states it was dispatched from Silchar TMO. Given that Silchar-Aizawl takes roughly half a day on private vehicles, Speed post is taking more than 5 days for my parcel to reach me. I have contacted the head office but they too dont have much of an idea. My tracking id is CP[protected]IN. Please look in to my problem as my parcel has important stuff that is needed asap.