Prestashop Controller - Change the current store on Multistore - php

Question

I have a multistore environment on a prestashop. I created a module with a controller to change store if postal code is not correct. The problem comes when I use Tools::redirect($newUrlToRedirect); it redirects to my current store, and I need it redirects to another store. This is my code:
class cartportkeyDeriverModuleFrontController extends ModuleFrontController {
public function init(){
//I am in the url http://localhost/shopgroup/shopnameCART/quick-order and
//check the postal code, then clicking a link I go to the URL
//http://localhost/shopgroup/shopnameNEW/index.php?fc=module&module=cartportkey&controller=deriver&id_cart=XXX&id_shop=YYY
parent::init();
$id_cart = (int)Tools::getValue('id_cart');
$id_shop = (int)Tools::getValue('id_shop');
$this->context->cookie->id_cart = $id_cart;
$link_order = $this->context->link->getPageLink('order');
$testShop = Context::getContext()->shop;
//HERE I OBTAIN THE storeOLD instead storeNEW so I am redirecting again to storeOLD
$testShop = json_decode(json_encode($testShop), true);
$newUrlToRedirect = "http://".$testShop['domain'].$testShop['physical_uri'].$testShop['virtual_uri'].'quick-order';
//print $newUrlToRedirect;
$cart = new Cart(33);
$cart->delete();
Tools::redirect($newUrlToRedirect);
}
public function initContent() {
parent::initContent();
}
}
I had put some clarifications in the code as comments. The question is, how can I change the active store??

Answer 1

I have found my own answer. Instead of getting the context in $testShop = Context::getContext()->shop;
Change that line for:
$testShop = new Shop($id_shop);
$testShop->getContext();
Everything fine. Thanks!