Добрый день. Хочу отключить автоматическую оплату сервиса.

If I understand correctly, you are looking to cancel your subscription from renewing.

You can simply downgrade your account to the free plan, and that will cancel your subscription:

https://www.jotform.com/help/341-How-to-Downgrade-Subscription-back-to-Free-Account

If you need further assistance, please let us know.