India Post — delay of speed post parcel

I sent a parcel by speed post from new delhi on 18.01.2019 to guwahati assam. Its been 10 days and parcel is not delivered yet. Tracking id - ed[protected]in. Noone at the post office picked up the call in last 10 days. I was told that speed post takes 4-5 days but i didn't expect this issue. Tracking shows the item is out for delivery on 23.01.2019 and still not delivered. Please solve my issue as soon as possible.