Most Elegant Themes themes come with an inbuilt Contact From as part of the theme. This is great when you don’t want a custom contact form, but if you need a custom contact from on a page with “contact” in it’s name then you need to turn the in-built form off.
If you don’t you end up with 2 forms on a page(Even if Default Template is chosen in the theme options).
By removing the ‘default’ ET Contact form you can create a custom form with any of the WP Contact Form Plugins
To remove the default Contact Form from an Elegant Themes theme just add this code to the Custom CSS Panel
That should do the trick :)