National Institute Of Open Schooling — books not received

Address:

New Delhi, Delhi

Sir,
I request you to help me for getting the study material, i had filled the form for 12th class and del. Ed. I asked at nios office which is at gandhinagar, they given me the contact number of book store which is situated in delhi i. E.[protected] and[protected]. I have called many times but no one is receiving call, what should i do in this. I had submitted they money for my study materiel and that needs to be deliver at my door steps, i had done registration of year 2017-18, but i haven't started any of the preparation because of study material not available.