How do I avoid the wording “FREE” when i dont put the price for a category

Hi,

I have two problems:

1: how do I avoid saying the word “free” when I don’t put the price? If i “hide prices” it won’t show prices at all

2: the shortcode [salon_booking_services styled=true columns=“2” category=“3,4”]
when I put the category service in the category shortcode for example “aromatherapy” the plugin just won’t show. If I edit anything it will show all prices for all services without filter the service I put in the category.

Support of this plugin it’s very poor.
If i dont find help here i think ill move elsewhere. It’s already a lot of headaches with this thing

The page I need help with: [log in to see the link]