Compu tech credit service makes money off of honest hard working individuals, Sies for you, ****************

I am getting threatening emails from Compu tech credit services saying I owe them R1900, (don't ask me how that's possible, since I have never dealt with these people) now I'm getting letters from Sherrif of the Court that will repossess unless I pay up, I've got exactly 3 days, Can they even do that?? Repossess my stuff!! They are supposedly credit service company, so my question what credit service have they EVER rendered me!! This is ridiculous, totally crazeeeee