India Post — Misplaced parcel CY[protected]IN

A booked by ignou rajghat on 17 September.2020 has not delivered till 17 January 2021. This parcel contains my books and my exams are scheduled to be held in February 2021. The article no. Is CY[protected]IN. I am unable to track this parcel. I visited samaipur post office and without checking the article number.. they said that we don't receive ignou article go to rohini sector 5. I visited rohini sector 5 post office 2 times. They said we received this parcel and sent it to Samaipur post office. But samaipur post office is not providing any specific information about the parcel. Alrdy sent a Complain to the dak bhawan. But no action has been taken.