Stupid-lifestyle legal

I have a problem with lifestyle legal they were always sending me messages that I am owing and I should make urgent payment before taking legal actions against me. My problem is that I don't know why tHey said I am owing because I don't know them and I've never hear ABOUT them before they started threatning me. And now they Blacklisted me on the transunion...what is the meaning of this, because we dont have the power you( Nandie Paich) decides to blacklist and claim that I owe you when infact I dont and never used your money**i am ****ed and taking this Nandie piach and her company to court