They called for my husband and they gave me an agent ID. She would not say what it was in regards to just a call back number. When I asked what the name of the company is she said TLS. I can not find anything in Dallas TX for this number or that company name. When we called back it said we reached the General Investigations Unit. No idea who these people are our what they do.

Pretty sure its a debt collection agency.  They say they are "agents" so you think you are in trouble for something.  Its stupid and very very very annoying especially when they ha e the wrong number!  Just put it on the blocked call list. :)