HAPPY READING :)
I guess this link will be helpful to you to track your Study Material Status:
IGNOU - Material Production & Distribution Division (MPDD) - Study Material Status
You can contact to your Regional Centre too. But before going to regional center, checking the status online is a best option to save your time.
When you track it online, you will get consignment number of Courier Service (mostly Indian Post). Then after track your consignment on the respective courier service website.