Stop spamming your calls. I do not pick up the phone if I don't t recognize it. Just as I really do believe I've won the lottery in UK via email really.
Um...people, the owner of the phone number does not read this website. Saying "stop calling" is not going to do you any good. Believe me, they don't read it.
WCA Subscriber Services is a company that offers crap via automated phone messages. This is effectively an outdated form of spam. I don't know who owns WCA, nor is it easy to track them down (but I'd like it if someone did). If you are getting called by them, I'd suggest the following:
1) use the 'opt out' option given by the message.
2) record any numbers WCA calls you from.
3) get on the FTC's national do not call list (call 888 382 1222 or go to www.ftc.gov).
4) complain about further contact (make sure to get the number WCA calls you from)
Screw these guys. Would you hit up your buddy to buy crap? What about a stranger? Or thousands of strangers? And with an answering machine? Don't just ignore it, do something about it.