Modify "SUBMIT A NEW TICKET" text

on [support-system-submit-ticket-form] .

Also I would like to know if its possible to change the styling of the FAQ [support-system-faqs].
I found that if the option is set to
"Use Support System styles" - http://prntscr.com/9rbdip it just doesn't matter how I try to change. If this checkbox isn't selected, there's no formatting at all. I only wanted to change the font size and the background colour. Is it possible to do so without needing to format the whole thing?
Thanks!