How do I cancel my Professional subscription?

You can cancel your Premium subscription by doing the following:
1. Go to your profile at http://knoema.com/user. You would need to login if you are already not logged in.
2. In the top left corner you would find Cancel subscription button. Click on it and confirm cancellation. 
3. Your Premium subscription will be cancelled and downgraded to free. Your credit card would not longer be charged.