Mr. Dulton from Cash Net called and said that he was calling about a bill that occurred 3 years ago, and was trying to resolve it.  I told him not to call my job and to do what he had to do.  This is the 3rd time he call.  I do not want him to call my job anymore
What can be done

A black guy named Mr. Edridge said he was calling from the Law firm Berkley and Associates and said I owed $300 to CashNet USA. After giving them my information to withdraw the funds I contacted ashNet USA and they informed me that these people are scammers.