What I found out is that you cannot really block cell phone calls. And no matter if you report them on this site, haven't even seen any company going after these stupid jerks. Am also on "Do Not Call List." This doesn't do anything for us either.
213-426-1021 ...about 6 or 7 messages over the last few months. Always same message, a burst of sound like music, then a man saying "hello? Hello?" And that's it.