— Support

Tell us what’s wrong.

A mistake in an exercise, trouble signing in, a payment that didn’t unlock what it should — write it here. A real person reads every message and replies within 14 days, usually faster.

Have an account? Sign in first and the conversation is kept in your account as well as your inbox.

Reset it yourself in a minute.

Business detailsWho runs the site, and the legal notices.

What happens next

Your message goes straight into our admin panel the moment you send it — there is no mailbox in between, so nothing gets lost.
We read it there and reply by email.
If it is a mistake in an exercise, we fix the exercise too.