To stop recurring subscription, go to your profile and click Cancel auto-renew subscription.
Under NEXT REBILL DATE
Recurring payment is only for 3, 30 and 90 days.
After you purchase a 3-day trial account, you will be automatically billed for the 30-day subscription after the 3 days expire.
If you activated your account using a voucher code, then you will not have any recurring subscriptions (voucher codes are used only once).