I also was able to easily cancel online a few months ago (not in California). I'm wondering if they changed their policies recently, in which case this complaint is out of date.
I ran into this myself 18 months ago. I had subscribed years ago online, but was unable to cancel online.
I informed the person who canceled my subscription over the phone that I'd never consider doing business with them again, unless they fixed the problem.
I hope it's fixed now! That'd be a great improvement