NAFS Nightmare - too soon to sue?

I received phone calls on my ans. machine for three consecutive days that were pretty scary, stating "you have until 5pm today to return this call". I was out of town so I called last night and talked to a guy who wouldn't give his last name. I asked who he was, why he was calling me, the name of his company, and wouldn't give me any info but proceeded to ask me personal questions such as DOB, SS#, etc.

I wouldnt give him that info, but informed him I have never done business with him and to stop contacting me. He said that he would "pretty much call me every day until he received an acceptable result".

I pressed him again as to what the matter was regarding, and he hung up on me. Five minutes later I got a call from my mom, he had called her looking for me, asking if my dad was my ex husband (clearly he is NOT), asked if she knew how he could get in touch w/ me. She said no and hung up.

Thirty minutes later I get a call from my sister who states that her mother in law who I barely know got a call from this guy, asking about me, saying that I used her as a reference (I don't even know her first name!).

I looked up their info on the BBB, they are National Action Financial Services and have a nasty reputation.

I've had it with these people. I am sending a letter C&D to their "Compliance Manager", but feel like taking them to court. They upset and harassed my family and friends and me, made me feel like a deadbeat because I know that my finances are in good standing, I only have one card for travel.

Is it too soon to take them to court for violations of the FDCPA? Or should I wait a while longer and see what happens?

I can't believe that these companies can get away with this sort of harassment. I've never received any information from them or I would have dealt with it before they started calling and harassing me and everyone I know.

Please advise