Hello Having some problem with importing demo content post theme installation.
Have you tried to contact the theme author for support?
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.
Also you can check your theme Options if you find anything related to the issue in the theme settings.