We’re so sorry to hear that you wish to unsubscribe from your Brainscape account. Please contact us and we’ll be happy to delete your account for you.
Note: If there are other people using flashcards that you created, it may be safer to just change your name & email address, rather than deleting your account, so that those associated flashcards don't also get deleted. (This will protect your identity, if that was a concern, without actually harming people who were studying your content.)
If you simply want to deactivate your account, but come back to use it at a later date, then you can always just leave it alone for now, and ensure that you have stopped any paid subscriptions.