Redirects to thankyou page even when there are issues

The form isn’t suppose to send an email but only data.
When submitting the form it redirects to a thankyou page even when it has errors in it.

<script>
document.addEventListener( 'wpcf7invalid', function( event ) {
  window.location.replace('https://greenpeace.org/israel/');
  console.log('running');
}, false );
</script>

The page I need help with: [log in to see the link]