What resources or agency you go if your supervisor slander your name?

What resources or agency you can go to if your supervisor slander your name and call different company and make false statements and have your name placed on the black list so you will never be able for rehire agian by the corporations that owns alot of healthcare facilities.? I called pre paid legal services, and the lawyer told me to get a friend to call my x supervisor and ask him about a refrence about me, but my x supervisor do not return phone calls . I wanted to view my personnel file and I cant even get that as well because he will not return calls and also the receptionist keep forward me to his voicemail or make excuses like he on the phone or he is outside. Who should I contact to look futher in this investigation. It took me 1 month and half to find a job and I was constantly denied until I had to drive so far to get a job by another company it was very stressful because of the damage he did. Please help and give me advice.
PS: one of my friends told me to contact fair employment and housing agency,they said it a good agency, but lack enough money to pursue every case. I dont want to get stuck like that . anyone know any valuable resource to help me get a case?

I'd stalk him and then kill him. Everyone reading this who does stuff like the supervisor in the story above, remember that the person whos life you ruin might be a psychopath. Or they might just be having a really bad day sometime and decide to pay you and your family a little visit. Remember these words well.

Your pre-paid legal lawyer was asking you to get PROOF.

How do you knows that you were slandered and that the supervisor called someone, made false statements and put you on a blacklist?

If you have no PROOF, you have no case. If you have no case, no agency can help you.

Slander and libel are addressed by civil litigation, if that is necessary.

Your reputation is damaged. Consult your attorney about your options.