Indiapost.gov.in — delay on delivery of parcel

Address: New Delhi, Delhi, 110029

I have booked my register parcel on 16/11/2017 and today is 12/12/2017 it's almost a month now. What can be the cause on delaying my parcel. The current status show ph guwahati.. Why is the guwahati branch holding my parcel? It's so annoying to know the unwanted holding and delaying on delivery when we trust your service. Kindly look into it my consignment no cd[protected]in