If for some reason you want to cancel your current subscription, you can do this in few easy steps. Please remember that if you simply wish to change your payment method or change your current plan, you should instead read this helpful article:
To unsubscribe you can follow these steps:
Login to your account
Go to "Settings"
Find the "Account Information" section
Click the unsubscribe link
NOTE: Only the Admin account has the option to unsubscribe a Business or Enterprise subscription.