Diary & Availability Calendar

I need to edit the legend in diary & availability calendar. This is really important as the standard wording contravenes the terms of our trading licence. My problem is that the “some spaces available” slot needs to be replaced by about 4 lines of text, and I can’t get the next category to move down to allow room for it. I’ve tried all the standard line break codes/ insert line codes with no success. Does anyone know, is there a formatting code somewhere else in this widget that is over-riding it?

https://www.eclipsesailing.gr/private-sailing-charter-greece/private-charter-availability-calendar/

I also need to take out the lines at the bottom that say Availability + date + e.g. “All Day”

Thanks in anticipation