You can do one of two things: 1) call the number, tell them you are on the do not call list, and they will remove you from their list. 2) you can file a complaint online with the FCC. It will be handled accordingly.
I've been receiving weekly calls from them for a long time. I finally found this website and took your advice. I called 201-520-9537 and asked them to add me to their "do not call list". The lady politely said it would take 48 hours. Hopefully that works.
I am usually at work when this number calls or I just don't answer it because I do not know the number. It appears it is a call center for a trade publication .