You can cancel your subscription renewal payments while your membership is active up to 24 hours before the renewal date.
If you cancel the subscription less than 24 hours before it is due to renew, you are likely to be charged for the next subscription period. In this case you will retain access to the subscription service until the next renewal date.
Go to [Account Management] > [Services List] on your PlayStation system or go to the [Media] tab in account management to find and cancel the subscription service.
If you would like step by step instructions, select the device you will be using to cancel your subscription.