Repeated and unwanted phone calls. I asked the name of the company & they refused to give it. Caller ID shows " T.C.S. '' XXXX. I was hung up on when I asked, I called back and another person refused to tell me who they ( company ) were. Internet search shows Thunderbird Collections XXXX in Arizona. These fools need a lesson in manners and phone etiquette. Once I stated to not call me, they used my name, referenced other family members and referenced me as being too stupid to understand. They apparently researched my phone number to know me, but continue to call for someone not living here.