If you created your subscription using Google Play, then you can cancel your subscription in the Google Play App under subscriptions. Alternatively, you can cancel your subscription from their web portal.
If you are unable to locate the subscription screen, please send me the receipt number that Google Play emailed you. It will look like GPA.#####.####... We will then manually cancel your subscription. See this article on how to cancel your subscription
If you used PayPal from our web portal, then you can cancel your subscription from within PayPal or our web portal.
Let us know if you have any difficulties, and we can manually cancel the subscription for you.
If possible let us know why you are cancelling, it helps us understand what we can do better.