The plugin is not appearing the same way as shown in the preview of the item

There are several factors missing in the plugin and the navigation is becoming difficult.
I would like to know how to resolve this problem or did I miss something while installing the plugin.

Please check the link below and let me know how to make it like the one in the preview

Africa

Preview link – http://preview.codecanyon.net/item/hotelbookingphys-woocommerce-hotel-booking-plugin/full_screen_preview/22206257?_ga=2.141157042.1849692047.1644903643-994929334.1640934294