Phone tree that eventually lead to "cancellation" but then that just looped a long message that ended with "To confirm cancellation, press 2." I pressed 2 and was told this was an invalid option and restarted the cancellation message (and over and over, if 2 was pressed). I just hung up.
Not sure what WCA Subscribers is... but when I called, the recording said the offer was for subscribers and they couldn't identify my phone number. If I wanted to be removed from the call list, to press 1 and enter my number after the tone. I did so... and then it said to allow 7 days to process the request.