Delete Associated Media Upon Page Deletion

Hello,

How the title said. I have a realy problem with my host space because of the associated media.
Actualy i have 1.800 listing, i have remove another 400-500 listings, but after i delete the items the space host it’s the same.

I have added on the function.php file the next code but not work:

function delete_post_media( $post_id ) {

$attachments = get_posts( array(
‘post_type’ => ‘attachment’,
‘posts_per_page’ => -1,
‘post_status’ => ‘any’,
‘post_parent’ => $post_id
) );

foreach ( $attachments as $attachment ) {
if ( false === wp_delete_attachment( $attachment->ID ) ) {
// Log failure to delete attachment.
}
}
}