Unsure who they are. They leave a call back number so fast I cant understand. I tried calling the number they called me with but it keeps ringing.

I have no idea who this is, but they just called my cell phone and didn't leave a message.

Robot call, they stated they were from Advance Capital Solutions and were going to attach my social security number.  Scam.  # legally they cannot do that

All debt collectors are required by law to send you a DEBT VALIDATION. This is sent through the USPS ONLY (email, text, faxes, carrier pigeons, smoke signals...none of those count) and state when you incurred the debt, to whom you owe the original debt, and how to proceed should you not recognize the amount.
This must be sent within 5 days of the first time the company attempts to contact you.
REAL DEBT COLLECTORS SEND THIS. Scammers do not.

A few other things to know-
-You cannot be arrested for ordinary debt in the United States.
-Process servers do not call in advance. They only get paid if they deliver you papers the court (not a private company) has ordered be delivered, and if you flee, they don't get paid. Therefore, they do not call ahead of their arrival.
-Likewise, officers do not call you to tell you they will be arresting you. Why would they?

http://www.consumer.ftc.gov/articles/0149-debt-collection
This link contains all the rules debt collectors must follow, and includes links where you can report criminals who choose not to follow the law.

Received a call from Advance Capital they said they had a file with my name on it as I was a person of interest. They wanted to verify the last four of my security when they said 1234 I told them that is not mine, then they gave a date of birth again they were off.  The lady continued and I told them that they were to send all that they thought pertained to the scam to my post office box.  They said they did do things that way. That if I had an email address they could do that, I told them by law they would send it to my mail box other than that they were a scam and the last company that tried to scam me, I took to court and won a large settlement, would they like to join them.  She told me I was scamming her company and she needed an email address, I told her try this one  kissmyass@yahoo.com.  She hung up.