If you want to get off the call list of a telemarketer, the 'Mrs. Doubtfire' bit seems to work pretty well.... Interrupt them politely, and ask them to hold on, -- yell, "Erlene! I TOLD you not to do that! Don't make me get the hose!"... then sweetly say "sorry, you were saying?"... For some reason if done right, they sometimes even forget what it was they were trying to sell you. 
