add some text above colophon socials

colophon_socials_title.php

add_filter('tc_colophon_left_block', 'add_html_above_socials');
function add_html_above_socials( $_html ){
  $my_html = sprintf('<span class="my_social_title">%s</span>',
            __('Follow us', 'customizr-child')
        );
  return str_replace( '<span', $my_html.'</span', $_html);
}

/* add this to your css, of course without comments :D 
 * and style it the way you want (display: block is the important part ;))
 *
 *  .colophon .my_social_title { display:block; color: purple;}
 */