Cannot get them to take number off their list

I have tried everything to get my number off their list--I believe that the federal no-call list is the problem.  I was on Wi no call for three yrs , no problems, two weeks ago friend said be sure you are on federal list, kaboom, three days later the calls keep coming in.  Different places show up on caller ID--some in Ann Arbor, MI; Lansing, MI;McClean, VA;and a few others I did not keep numbers of.  If you try and re-dail off caller ID, you either get a busy signal or robo voice saying you cannot call that number.  If you pick up once and get someone telling you they are with this jerky company, they say that they are w/no-profit organization, or charities, which are exempt from federal no-call regulations  So where did they get my number???? From that stupid list.  I have tried several times to put in my number to be taken off their list, but believe they must have zillions of lists as I keep getting calls.  Where can one turn?  HELP!