Hi,
As I can see, the latest version of the theme is installed on your site. What demo version do you want to import?
WPBakery or Elementor?
Provide temporary wp-admin access. Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
Regards