Theme Matching on update

I recently updated the plugin and it now matches my theme where it didnt previously. This would be great, but the buttons are now formatted to match as well and they look a little silly as they now overlap my contact form. Is there a way to revert back to the default look of the plugin?

You can view the problem here:
http://www.tielphotography.com/index.php/contact-2/

I appreciate any help you’re able to give.

https://ww.wp.xz.cn/plugins/google-calendar-events/