It is not possible to cancel your 12-month Seanapps subscription before it expires. You will need to wait until the expiration date and simply choose not to renew it, as the renewal is not automatic.
How can I cancel my Seanapps subscription?
It is not possible to cancel your 12-month Seanapps subscription before it expires. You will need to wait until the expiration date and simply choose not to renew it, as the renewal is not automatic.