For the social icon hover, pls input the following custom css –
#sidebar-header .social-list a:hover i { color: #333; }
For the contact details, pls remove custom CSS and then edit the Row in SiteOrigin Page Builder. You should see the tab Layout on the right. Pls choose the option ‘Full Width’ instead of the currently chosen value ‘Full Width Stretched’ in the Row Layout setting. Pls post a temp login in case you still have trouble.