Kapee Wp theme Double Menu Problem

Since you are using a paid theme, you should be asking for support over there :
https://themeforest.net/item/kapee-fashion-store-woocommerce-theme/24187521

Presumably you already checked under :
Appearance –> Menus ?
Bc there are definitely two entries for the main nav :

View post on imgur.com

for a theme specific issue visit: https://themeforest.net/item/kapee-fashion-store-woocommerce-theme/24187521 to get support and documentation about how to remove or hide the display of a category menu in various views (i.e. for wide and narrow screens).

the theme’s support team is most familiar.