Hello Alex.I am sorry you got an error message when you tried to you fill in our Moodle.com contact form (community section)
I will raise the issue withour tech team on Monday to try to identify the problem you are having - it seems to work for others but obviously something is amiss for you.
Feel free either to post the URL of your site here if it is not secret, and I will unregister it for you, or else send me a private message if you would prefer and I will help resolve the problem.