We'll create fresh WordPress site with Woo Already Bought installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Woo Already Bought enable to display custom messages for users who bought any product already or if product was added to cart yet.
Also you can easily change default WooCommerce message that inform clients that product has been added to cart.
WooCommerce Settings >> General >> Alredy Bought
and enable plugin and options and define the custom messages.