The first time, I just hung up after they gave the options - 1 for more info, 2 to be removed from their list
The second time, I hit 2 - it said that my number will be removed
The third time, I hit 2 again - could not think of anything better to do to put a stop to this
I've had my number on my state and national do not call lists ever since I got this phone and have renewed both every 2 or 3 years.
I have not reported this to the FCC -- every time report incidents like this they respond that after investigating they've determined that the caller did not violate the law.
I suspect in this case, the loophole the caller is exploiting is that they are providing notification of being awarded a "prize".