Debt collector for portfolio recovery services continues to call my cell phone about someone else 's debt. I told them they have the wrong number. When I asked how they got it they refused to tell me and told me that my friend gave it to them. He never gave them my phone number. They have used automated dialing systems to call my cell phone without consent. When I called to have my number removed the lady was very unprofessional and rude. I asked for a supervisor and she disconnected the call. I told her I needed her to listen to me and she said " not today ''. And asked me why I was calling about someone else 's account - when I was returning the call they left me. I called back and the supervisor refused to give me information about their company such as where they are located and what is their contact information for corporate. I had to ask several times if it was a debt collection agency before he confirmed.