add_action('woocommerce_checkout_process', 'pinion_add_order');
function pinion_add_order($m, $a) {
    global $woocommerce;
    $address = array(
        'first_name' => 'Project Paid ',
        'last_name'  => $m
    );

    $order = wc_create_order();
    $order->add_product(($a == '100000' ? get_product('2858') : get_product('2859')), 1);
    $order->set_address($address, 'billing');
    $order->set_address($address, 'shipping');
    // $order->set_total($amount);
    $order->calculate_totals();
    $order->update_status("Completed", 'Imported order', TRUE);

    return $order;
}