How disable submit button after call OpenModalDialogCommand in Ajax callback?

I have a block that has a button, when pressing that button an ajax is triggered that shows a popup with the OpenModalDialogCommand event, after closing the popup I want to deactivate the submit button, does anyone know how to do that?

The form

    $form('actions')('submit') = array(
      '#type' => 'submit',
      '#value' => $this->t('Get cupon'),
      '#prefix' => '<div id="cupon_form_wrapper">',
      '#suffix' => '</div>',
      '#attributes' => $results > 0 ? array('disabled' => 'disabled') : (),
      '#ajax' => array(
        'callback' => '::_modal_form_cupon_ajax_submit',
        'event' => 'click'
      ),
    ); 
function _modal_form_cupon_ajax_submit(array $form, FormStateInterface &$form_state) {
    $response = new AjaxResponse();
    if ($form_state->getErrors()) {
      unset($form('#prefix'));
      unset($form('#suffix'));
      $form('status_messages') = (
        '#type' => 'status_messages',
        '#weight' => -10,
      );
      $response->addCommand(new HtmlCommand('#cupon_form_wrapper', $form));
    }
    else {
      $content = 'Lorem ipsum';
      $title = 'Download';
      $response = new AjaxResponse();
      $response->addCommand(
        new OpenModalDialogCommand(
          $title,
          $content,
          array(
            'width'=>'300'
          )
        ),
        $form
      );
    }

    return $response;
}