Include Comment Meta Fields in Email Notification

I’ve tried to automatically send the comment meta field values in the notification email. It’s getting very close, but I can’t quite get it to work 100%. The code below shows the field titles, but it doesn’t get the field value, and I can’t for the life of me figure out what to do to fix it. Any help would be fantastic, please:

// Customise comment notification email
function custom_notificaion($notify_message, $comment_id) {
$comment_obj = get_comment($comment_id); //Get comment object
$comment_post = get_post($comment_obj->comment_post_ID); //Get post object

$comment_meta = get_option('wpcomment_meta');
foreach ($comment_meta as $index => $meta){
	$comment_meta_key = $meta['data_name'];
	$comment_meta_val = get_comment_meta($comment_id, $comment_meta_key, true);
	$num_id = trim("$comment_id");
	$comment_meta_val = get_comment_meta($num_id, $comment_meta_key, true);
	if($comment_meta_val != ''){
		$noticeText .= sprintf(__('%s '), esc_attr($meta['title']));
		$noticeText .= sprintf(__('%s'), esc_attr($comment_meta_val)).' | ';
	}			
}

//Check if it is your post type
if (isset($comment_post->post_type)) {
$noticeText .= 'New feedback on post '.$comment_obj->post_title.' << '.get_the_permalink($comment_obj->comment_post_ID);
	$noticeText .= ' >> From: '.$comment_obj->comment_author.' | ';
	$noticeText .= 'Feedback: '.$comment_obj->comment_content;
        return __($noticeText, 'text-domain'); //Return the custom message here
    }
    return $notify_message; //Return default message for rest of the posts
}
add_filter('comment_notification_text', 'custom_notificaion', 10, 2);