If you are no longer using the account, you can delete it from within the admin console. This article will walk you through how to do delete your account.
Q. Can I switch to a free plan?
A. We do not have a free plan available.
Q. Can I cancel my renewal ahead of time?
A. We are not able to cancel renewals in advance.
Q. Where can I find my renewal date?
A. The account owner can find the renewal date in Settings -> General -> Account, billing, and usage.