I would like to change the wording in my default booking form.

Attached is an image of the screen with the wording I want to change.
I have tried to do a Language override using COM_MATUKIO_PAID_EVENT changing original wording "Paid Booking" to "Confirm Booking"
Unfortunately "Paid Booking" still presents itself on the website.
Any support greatly appreciated

Website link: http://nzelectricalgolf.co.nz/events/auckland/book/11-auckland.html#page-2

Thank you for the support