Threatened to contact someone or share information improperly: Debt collection

Onemain financial is harassing me at my work place and endangering my employment as this is prohibited at my workplace. They have contacted my employer on several occasions and my employer has told me this is NOT allowed, my employer stresses this is NOT a place to collect any forms of debt. I contacted onemain by the phone and told them stop contacting my employer. Onemain can contact me directly through MAIL. Nothing else. I FORBID ANY FURTHER CONTACT OUTSIDE OF DIRECT MAIL. IF ONEMAIN CALLS MY PHONE NUMBER OR MY EMPLOYER AGAIN, I WILL BE FIRED AND USED THAT AS A WAYS TO SUE ONEMAIN IN COURT ATTACHED WILL BE THIS COMPLAINT SHOWING I WROTE A CEASE TO DESIST ALREADY AND THEY WERE WARNED.