In 99% of the cases - there is no recourse. In one instance, I tried replying and they asked me to prove my identity as the customer to cancel the emails.
Wtf is wrong with putting contact information in the unsubscribe link, or reach out productively on request? Why would you presume somebody clicks it by accident vs. the much more likely case of it being a legitimate request? Are you afraid they really want to cancel your service? Or are you afraid you can't send spam under the guise of transactional messages? Or worse, listen to customers about how best to alert them? Truly ridiculous!
By law, depending where you are, a unsubscribe link has to be instant. So there can not be an intermediate screen asking for confirmation or showing contact information. Well, you could show contact information, but then the unsubscribe (of in this case service critical mails, thus the service itself) had already happened.
It is neither dire nor prevents clarification, nor prescribes a specific experience related to unsubscribe links. It's odd to hear the only options are between receiving messages and having service terminated. That sounds pretty user-hostile tbh.
[1] https://www.ftc.gov/tips-advice/business-center/guidance/can...
The company won’t talk to me, and the sender sends a lovely message, but no contact information.