Can a collection agency call and threaten your boss and other employees?

I have a collection agency who has called my place of employment. James Wilson 347-709-1643 or 646-397-2416 address is 101 E Green Street, Brooklyn NY 11413 has called my boss, other employees and myself ******* bitches and if I do not pay a payday loan he will put us in jail for 45 days. He will get my fired from my job. He said this was a bad check from account that was over 4 years ago. He wants this money by July 1st or he will come and arrest me. I am at the point I now am refusing to pay this bill because of this behavior. I tried to talk to his boss Dennis Peterson with not success. Mr Wilson also states he is officer and his badge is 27642. I need to know if he can legally call my place of employment and threaten me and other employees?