Radio buttons are not aligning vertically

I have created a form which uses radio buttons. The radio buttons are not aligning vertically but rather at a slant from top left to bottom right. I have checked the code and there isn’t any problem.

The site locations is:

http://www.studioj.me/gp

The form will be found at the bottom of the page.

Thanks in advance.

https://wordpress.org/plugins/contact-form-7/