Cannot disconnect calendars from my account

There are several calendars on sites that I no longer have access to that are connected to my Time.ly account. Presumably, they are using MY credentials to connect. There does not seem to be any way to disconnect these calendars from within the Dashboard. It would seem that this may be a security issue.

I submitted a ticket, and Time.ly referred me to their support page which has ZERO information on disconnecting calendars from an account.