You’ll need to look at the generated HTML that is output.
Hopefully you’ll see something (eg. a class attribute value) that will help you to identify where it’s coming from.
My guess would be the template, but maybe not.
Once you figure that out you should be able to modify it to what you want it to be.
As both the plugin and template are “premium” that you’ve paid for, do they not have some type of support?