If you would like to delete your account and all data associated with it then please email us at support@project.co
The email must come from the account creators email address. This is for security as we can only delete accounts when requested by the account owner.
Deleting your account is a manual process so it's something we need to do for you.
Alternatively, if you are on a paid plan and you want to stop your billing but retain your account, you can downgrade your account to free by going to Account Settings > Billing and choose the free plan.