I need to do redirect in functions.php

I use contact form 7 and I save my data in bbdd when the form is fill. For that use:

add_action( 'wpcf7_before_send_mail', 'save_form' );

function save_form( $wpcf7 ) {
  global $wpdb;
  $submission = WPCF7_Submission::get_instance();

  if ( $submission ) {
       $submited = array();
       $submited['title'] = $wpcf7->title();
       $submited['posted_data'] = $submission->get_posted_data();
    }

    $data = array(
      'empresa'  => $submited['posted_data']['your-empresa'],
      'nombre'  => $submited['posted_data']['your-nombre'],
      'apellido' => $submited['posted_data']['your-apellidos'],
    );
    $table = $wpdb->prefix . 'users';
    $success = $wpdb->insert( $table, $data );
    // doesn't work
    //wp_redirect( "/info-contratar/" ); exit();
    //wp_redirect(site_url('/info-contratar')); exit();
    //header("Location: /info-contratar/"); exit();
    return $success;
}

When functions end. I need use other view: info-contactar, but it never doing redirect. Only I see a Get request with firebug tool.

How can I do redirect and show my page info-contratar?

Regards!