Add Random Sorting to Adverts Lists

Greetings. I was trying to add the option to randomize the listing through the shortcode (using a duplicate of it and setting on functions.php) I was trying to add the parameter like this but i have no results.
[On the original file is around the line 120 of wpadverts/includes/shortcodes.php]

if( isset( $sarr[1] ) && isset( $sort_options[$sarr[0]]["items"][$adverts_sort] ) ) {

        $sort_key = $sarr[0];
        $sort_dir = $sarr[1];

        if($sort_dir == "asc") {
            $sort_dir = "ASC";
        } elseif ($sort_dir == "rand") {
            $sort_dir = "RAND";
        }else {
            $sort_dir = "DESC";
        }

        if($sort_key == "title") {
            $orderby["title"] = $sort_dir;
        } elseif($sort_key == "date") {
            $orderby["date"] = $sort_dir;
        } elseif($sort_key == "rand") {
            $orderby["rand"] = $sort_dir;
        }elseif($sort_key == "price") {
            $orderby["adverts_price__orderby"] = $sort_dir;
            $meta["adverts_price__orderby"] = array(
                'key' => 'adverts_price',
                'type' => 'NUMERIC',
                'compare' => 'NUMERIC',
            );
        } else {
            // apply sorting using adverts_list_query filter.
        }
        //if($sort_key == "random") {echo "random";}

        $sort_current_text = $sort_options[$sort_key]["label"] ;
        $s_descr = $sort_options[$sort_key]["items"][$adverts_sort];
        $sort_current_title = sprintf( __( "Sort By: %s - %s", "wpadverts"), $sort_current_text, $s_descr );
    } else {
        $adverts_sort = $order_by;
        $orderby["date"] = "desc"; 
    }

And i see that later i can switch the ordering to random directly but the idea is having the option instead of switching on the functions.
[On the original file is around the line 155 of wpadverts/includes/shortcodes.php]

$args = apply_filters( "adverts_list_query", array( 
        'author' => $author,
        'post_type' => 'advert', 
        'post_status' => 'publish',
        'posts_per_page' => $posts_per_page, 
        'paged' => $paged,
        's' => $query,
        'meta_query' => $meta,
        'tax_query' => $taxonomy,
        'orderby' => $orderby
    ), $params);

Where 'orderby' => $orderby i can shange it to 'orderby' => 'rand' but the idea is setting the random parameter on the first chunk of the code.

I have the impression that i missed somethnig but I’m lost.