Success! I called in...and waited through the multiple pre-recorded requests to "press0 and leave a message". There's about 10 of these requests one after the other. I got through to a customer service department and strongly phrased my request to be removed from the list.

Good luck everyone else.

This number responded to my craigslist ad and they texted wanting my name and address to send a check for the item. I don't know if it was phishing or what but they really pissed me the hell off...