michael knight he keeps calling me and threating me that he is going to throw me in jail if i do not pay him for a payday loan that i never got. Pennsylvania

michael knight called my job 11-28-2011. they gave me the message. i called him back and he threaten to throw me in jail if i do not pay for this payday loan that i did not get. i have no clue of how he got all of my information. well last time he called me back in may it was from a different number and i had the law to call him back and talk to him. well the calls stopped until yesterday when he called my job. well i know he is a fraud i have looked him up on the internet and all. he said i got a payday loan from cash advance usa well i never did.