There are two ways.  The simplest easiest way is to login to your paypal account you used to create the subscription.  If you did not have a paypal account when you subscribed, you created one when you did.  Check your emails for messages from paypal to learn more about logging into paypal.  Once you are logged, click on activity.  Then find the payment that was related to your membership here.  Click on details.  On this page you will see manage recurring payments.  Click on that.  Cancel your payment to us.
Before you use the second method, understand that there could be delays in cancelling your payment.  We need complete information to cancel your payment including, paypal email address, femdomtraining.ca username, and date of last successful payment.  If you have these things, you can contact us here.