India Post — register post rr[protected]se is not received

Address:

Kolkata, West Bengal

One register post rr[protected]se sent from sweden, is in new delhi dimc since 27th july. It is being 6 days there is no update. The letter is important to receive immediately. I called the toll free number to know the status. Came to know it is on transit. Does it really take 6 days to reach kolkata from new delhi? It is showing status: transfer from office of exchange (Inb).

With confidence i choose india post to send my important document.