Reply button out of place

I have the comments working apart from the reply button that is out of position. I would also like to know how to match the theme font style. Please see: http://www.kettlebell-fit.com/uk-made-indian-clubs/

I would like to:
A. position the Reply button in the relevant place.
B. know how to style the text to match the rest of my site.

I have used the Divi theme to create the site. Thanks

https://wordpress.org/plugins/comment-guestbook/