Sweepstakes drawing

Sweepstakes drawing

they are calling claiming to be from an attorney office and they have a claim against someone but when you try to call back you cant get no one

hahahaha u thought u could fool me you puny automated system.  lol don't press 1 they try and trick u by saying if ure smart then press 1 and have a chance to win 50000, then say that they will put you on with an agent then another automated system comes on and says to be placed on the do not call list press 1 haha not me

how do you stop them? how did they get my number?