Texas Credit Services

Has anyone ever dealt with these people. They are by far the rudess and over the top people. They called me at work about a payday loan from Cash Zone (storefront) and threathened to send someone to my job the same day if I did not pay up. I called them and the said things that should not be legal for any company to say to someone over the phone. Said they would be filing charges with the DA's hotcheck office. They have called me a couple of times since then and sen one letter that I know of that said I had five days to pay up or else. That was over a month ago. Nothing since then!