Or in your site front page, in the admin bar find Edit Page ( Back-end Editor ) or Edit with WPBakery Page Builder ( Front-end Editor )
You can edit icon, text, typography, colors and margins inside of this element edit box in page builder.
Instead Quick Contact also you can create any page and assign it.
In widgets find Footer 1 sidebar area and edit it.
For changing background of Footer, Go to Theme Options > Footer > Footer Widgets > Container Style Kit
This Footer has “Fixed footer under body ?” option On, if you want to turn it Off go to Theme Options > Footer > More