Make a page redirect if customer use certain voucher

[8659design]

I have maybe som odd question. On one page we have some old voucher codes that dont are in use anymore. Bur we still want contcat with customer thats try to use them.

So in prestahsop 1.5.3 solved that with this code in ParentOrderControlle.php and all have worked.

    if (($cartRule = new CartRule(CartRule::getIdByCode($code)))
                            && Validate::isLoadedObject($cartRule)
                        ) {
		if(trim(Tools::getValue('discount_name')) == 'discountA'){Tools::redirect('http://www.discountA.com');}
		elseif(trim(Tools::getValue('discount_name')) == 'discountB'){Tools::redirect('http://www.discountB.com');}
							
                            if ($error = $cartRule->checkValidity($this->context, false, true)) {
                                $this->errors[] = $error;
                            } else {
                                $this->context->cart->addCartRule($cartRule->id);
                            }
                        }

But now we will work with Prestashop 1.7.5 and still needs this function
I have found right place in cartContreller.php i think. But it seems that Tools::redirect dont work (maybe becuse this is executed with ajax?).

Does anyone have any idea how to solve this?