Envato: Got rejected on a PHP Script, why ?

Well after spending hours of work to create the script and write a good documentation, after waiting 3 weeks to get a response they sent me this morning the following message:

unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

The demo of the script can be found here

The script is a contact form page that is built with Bootstrap, jquery and AJAX and is using the PHPMailer library to send emails via SMTP.

Everything is escaped and validated on the backend, i don’t see a reason to get rejected, can anyone help?