Complaint Review: united nations legal dept

this is the second call i have recieved in a weeks time. the first call said i would be arrested in 20 days if i did not repay a payday loan from some company i have never heard off.  the guy said he was from the united nations legal dept and his name is matt johnson and he is a attourney. he kept trying to get me to say my full name as if he was reccording it. and tried to get my ss# and cell #.so i asked him if he was trying to scam me and he started yelling. he said the only way to pay this debt was over phone with credit card, i argued that i did not owe anything and was contacting the police..he hung up  today i get the call fron this guy and when i aksed for a street adress, he only daid he was in new york, but loast week he was in florida..  i think they are stealing websites info. i an concerened because today he had my ss#.