Subscriptions automatically renew unless you cancel them. If you do not want your subscription to renew, be sure to cancel at least 24 hours before the renewal date. This is an Apple and Google policy, and we are unable to change it. If canceled, your subscription will still be active for the remainder of your subscription period.
Please note that deleting your account or the app does not cancel your subscription. If you don't see an option to cancel your subscription, that means that you have already successfully canceled that subscription.
For instructions on how to cancel your subscription through Apple, see this support article: http://support.apple.com/kb/ht4098.
For instructions on how to cancel your subscription through Google, see this support article: https://support.google.com/googleplay/answer/7018481.