It appears you have already activated your new-style membership.

We kindly ask you to first terminate your new-style membership
by logging in to your Follow This Account

Navigave to the section "Subscriptions", click on your active subscription,
and then click on button "Close Subscription" on the left side.


After closing your new-style membership, please try this termination flow again...


You will then be able to complete your termination and let us know what you want to do with your green shares.