ContactController.php

<?php

    public function contactAction()
    {
        /** @var \Infinite\ContactBundle\Form\Handler\ContactFormHandler $formHandler */
        $formHandler = $this->get('infinite_contact.contact.form.handler');

        if ($formHandler->process()) {
            return $this->redirect($this->generateUrl('InfiniteContactBundle_contact_sent'));
        }

        return $this->render('InfiniteContactBundle:Contact:contactpage.html.twig', array(
            'form' => $this->get('infinite_contact.contact.form')->createView(),
        ));
    }