Changing your subscription selections is easy.
You can change your selections in your Manage Subscriptions area (login required). There you can cancel or change your subscription at any time, with no obligation.
If you have a subscription but receive an "Incorrect email or password" error, that means your need to activate your account by choosing a password, which you can do here: Activate Account
In the case that you want to add a one-time addition to your subscription, like a mug or a seasonal coffee, you can do so here: One Time Addition