US Cash Advance has called and harrased me at my place of employment and threatned me tht i would be arrested and made a spectale of los angeles, California

i received a harressing phone at my job on 2-14-13 tht i had been black flagged on my social security number for a loan that i did not take out of have ever had one. the gentlemen said he was from the sheriffs department and i was going to be arrested over a loan that i had not paid back. his name was charles west and number is 323-247-9718. he knew my social security number and where i worked. i contacted the state police here and they told me it was a scam and they took his number and assured me it would be taken care of. the charles west had a foreign accent and was very rude with me when i tried calling to find out what exactly was going on he said it was my problem and wait for the police they will be at my residence to arrest me! i tried to explain to him that i have never got a loan and he said that was my problem!