Change social icon with fontello's icon

Hi Guys,

i know this question has been asked may many time over, but i’m newbie and I’m having trouble understanding your directions.

1. i understood i have to upload the zip folder of the icon i want to use. And that is done. ( is a TripAdvisor icon btw)
2. I have to copy this code in the function.php of my child theme

// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
$icons[‘icon_name’] = array( ‘font’ =>’fontello’, ‘icon’ => ‘ue800’);
return $icons;
}
add_filter(‘avf_default_icons’,’avia_add_custom_icon’, 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
$icons[‘Icon Label’] = ‘icon_name’;
return $icons;
}
add_filter(‘avf_social_icons_options’,’avia_add_custom_social_icon’, 10, 1);

?>

3. i refresh the page and nothing is happening….what am i doing wrong? and if i have to replace the info such as [‘Icon Label’] = ‘icon_name’; where do i find this info? they are not in the folder i download, and not in the fontello website.

Hope you can advise.
many thanks