Here's how to cancel your monthly plan with Novel:
Log in to your Novel dashboard.
In the bottom left corner of your dashboard, click the arrow next to your name, then click 'Settings'.
Find the Novel Checking Plan box at the bottom of your Settings page. You will be able to see your next billing date, along with the invoice history for your plan.
In the top right of this box, you will see text that says 'Cancel plan'. Simply click this text to proceed with cancelling your plan.