public function WooCommerceRefundTransaction($order_id)
 {
     WPAM_Logger::log_debug('WooCommerce integration - order refunded. Order ID: ' . $order_id);
     //$order = new WC_Order($order_id);
     $txn_id = $order_id;
     WPAM_Commission_Tracking::refund_commission($txn_id);
 }