Woocommerce, recognize "cash on delivery" not valid addresses - woocommerce

Question

I'm trying to create a function.
My need is follow:
I have a cash on delivery payment method.
Sometime it happens that the shipping comes back because the address is wrong or not real.
Then I put this order in SPAM status.
I want that when I have a COD order, to check in all SPAM orders if address is present, if yes put the order in SPAM review status, so I can check it personally with client.
This is my code:
I put a check address button on "on hold" orders, that will check the addresses:
// 1. Create 2 new order statuses: SPAM and SPAM REVIEW
function create_new_order_statuses() {
register_post_status( 'wc-spam', array(
'label' => 'SPAM',
'public' => true,
'exclude_from_search' => false,
'show_in_admin_all_list' => true,
'show_in_admin_status_list' => true
) );
register_post_status( 'wc-spam-review', array(
'label' => 'SPAM REVIEW',
'public' => true,
'exclude_from_search' => false,
'show_in_admin_all_list' => true,
'show_in_admin_status_list' => true
) );
}
add_action( 'init', 'create_new_order_statuses' );
// 2. Register them in woocommerce
function add_spam_order_statuses_to_select( $order_statuses ) {
$order_statuses['wc-spam'] = 'SPAM';
$order_statuses['wc-spam-review'] = 'SPAM REVIEW';
return $order_statuses;
}
add_filter( 'wc_order_statuses', 'add_spam_order_statuses_to_select' );
add_action( 'woocommerce_admin_order_data_after_order_details', 'check_address_button_on_order_page' );
function check_address_button_on_order_page( $order ) {
if ( $order->get_status() === 'on-hold' ) {
$address = $order->get_address( 'shipping' );
echo '<button class="button check-address-button">Check Address</button>';
?>
<script>
jQuery('.check-address-button').click( function() {
var data = {
'action': 'check_address',
'address': <?php echo json_encode( $address ); ?>
};
jQuery.post(ajaxurl, data, function(response) {
if(response.found) {
alert('Match found, order status changed to "SPAM REVIEW"');
} else {
alert('No match found');
}
});
});
</script>
<?php
}
}
add_action( 'wp_ajax_check_address', 'check_address' );
function check_address() {
$address = json_decode( $_POST['address'] );
$spam_orders = wc_get_orders( array(
'status' => 'spam',
) );
foreach ( $spam_orders as $spam_order ) {
if ( $address == $spam_order->get_address( 'shipping' ) ) {
$order_id = $_POST['order_id'];
$order = wc_get_order( $order_id );
$order->update_status( 'spam-review' );
echo json_encode( array( 'found' => true ) );
wp_die();
}
}
echo json_encode( array( 'found' => false ) );
wp_die();
}
Of course doesn't work... any suggestion?