These are great questions! The good news is you can downgrade directly from the Plans & Pricing page under your account. With that said, a cancellation on the other hand requires us to submit a cancellation request, or for you to call into our Billing Support.
You also have the option of suspending your account for a nominal monthly fee. Suspending the account would allow for you to work on your campaigns and manage your contacts though you would not have the option to send emails. You can unsuspend the account from the “My Account” section at any time. Please let us know which option you would like to proceed with.