Checkout Has Been Spammed

Hello,

Hoping for some support for my WP Ecommerce site. Recently we discovered our checkout was being spammed. I have found the source in my developer tools using Chrome, but I’m not able to find it in my php files. Here’s a link…

http://www.senasys.com/shop/products-page/checkout/

Thanks in advance for the help!!

https://ww.wp.xz.cn/plugins/wp-e-commerce/