These "people" have been calling me since last September.  Usually a different number and different name but always the same "verse".  What I have learned to do is explain in perfect english (since they don't speak clear enough to understand anyway) that I would like their name and phone number, one even gave me an address to "send the money to" and tell them that you will be reporting them to the Federal Trade Commission.  They usually don't like this and probubly will in fact, call you an f'ing b----.  Then they will hang up but you do need to file a complaint with the FTC.  I have done this 5 different times.  Report as much information that you have.  I can honestly say, this has been very un-nerving getting these calls at my employment but soon after you report the number to the FTC, if you call the number back it will have a recording answer and say this number has been associated with a SCAM, so it seems to work.  Of course, that only works until they get another phone line.  Someday it will stop so please know you are not alone and please don't let them scare you into giving them any info.