Hi everyone! I wanted to let you know that this issue has been resolved now 
It turns out that the unsubscribe was working, but only if you didn’t write add a message in the form before clicking the button! That is part of why this wasn’t caught earlier.
Thank you everyone for being so patient and understanding with this issue, and for your kind help and emails to support.
We will be reaching out individually to people who may not have noticed that unsubscribing failed, and make sure they are not billed.
Have a great weekend everyone! 