today i purchased THE PASSION - Multipurpose Movie Video & Music WP Theme but its demo data import option not shown in admin panel
May be to get import option you will need to active theme license. Please check the theme documentation hopefully you will get necessary support.
Otherwise the best way to get the support is Contact your purchased theme Author. How to Contact Author and let them know. Don’t worry just contact theme Author. theme Author will be very happy to assist you.