File the online consumer complaint form with the FCC! It doesn't take any more time than it takes to google a phone number and leave a message on a message board. Here's a link to the form: http://esupport.fcc.gov/complaints.htm. The person who called me today had the same BS message they always do about credit card rates, and I told them I was going to file a complaint. She said to "go ahead" and hung up. I've been wanting to formally complain for ages, and boy -- it felt good to finally do it! I'm going to do it every time I get one of these annoying calls in the future.
This credit card company keeps calling to ask if I want to lower my interest rates on any of my existing cards. They call from different numbers listed to different states so they cannot be persued by the government no call list. If I don't answer the phone they do not leave a message. Caller ID states wireless call and gives this number. I get probably 3 of these a week but from different states, different numbers.