src/Didww/API2/DIDNumber.php
public function cancel()
    {
        $this->call('ordercancel', array(
            "customer_id" => $this->_order->getCustomerId(),
            "did_number" => $this->getDIDNumber()
        ));
        $this->orderStatus = self::ORDER_STATUS_CANCELED;
        $this->didStatus = self::DID_STATUS_BLOCKED;
        return $this;
    }
public function cancel()
    {
        $this->call('ordercancel', array(
            "customer_id" => $this->_order->getCustomerId(),
            "did_number" => $this->getDIDNumber()
        ));
        $this->orderStatus = self::ORDER_STATUS_CANCELED;
        $this->didStatus = self::DID_STATUS_BLOCKED;
        return $this;
    }
cancel order and deactivate did number
http://open.didww.com/index.php/6._Order_Cancel
@return DIDNumber