Thank you for sharing your thoughts. The renew script is in the cronjob already. Instead of just sending email alerts that do nothing to tell me there’s an issue, so I leave it alone as the crontab is in place, perhaps the email can carry the error – and the documentation can be a bit more helpful in how to remove a domain, etc, as discussed above.
Anyway, we have now learned our lesson. This ‘free’ service is OK for toy sites or personal blogs. Not for anything beyond.