Change Woocommerce order status programmatically - woocommerce

Question

I am trying to change order status by some conditionals by using woocommerce_thankyou action.
I created some custom order statuses with plugin:
By using this function - nothing happen, the status remain "in hold" and not changed as wishes:
/*after order done*/
function check_and_change_status($order_id){
if ( is_checkout() && is_order_received_page() ) {
$order = wc_get_order( $order_id );
$order_status = $order->get_status();
$product_in_order = false;
$items = $order->get_items();
$count = 0;
foreach ( $items as $item ) {
$product_id = $item->get_product_id();
$is_start_from_product = the_feild('get_an_offer', $product_id);
$the_startFromPrice = the_feild('startFromPrice', $product_id);
$the_winningPrice = the_feild('winningPrice', $product_id);
if ($is_start_from_product && $count == 0) {
$count++;
$price_that_paid = $item->get_total();
if($price_that_paid > $the_startFromPrice && $price_that_paid < $the_winningPrice){
$order->update_status('auctionpending');
}elseif($price_that_paid > $the_winningPrice){
$order->update_status('auctionwon');
}
}elseif ($is_start_from_product && $count > 0) {
/*Do it later*/
}
}
}
}
add_action('woocommerce_thankyou','check_and_change_status');
What i am missing?
The conditional are work well (I have been debugged that), but the order status not changed.

Answer 1

You use the_feild in your foreach loop.
The wordpress function is the_field.
the_field($selector, [$post_id], [$format_value]);
Where $selector is your field name and [$post_id] is the place where your value is saved.
Edit that and try again
$is_start_from_product = the_field('get_an_offer', $product_id);
$the_startFromPrice = the_field('startFromPrice', $product_id);
$the_winningPrice = the_field('winningPrice', $product_id);