I have received numerous debt collection calls from Midland Credit Mgt. XXXX XXXX XXXX, XXXX XXXX, XXXX XXXX, California XXXX. Collection Agency blocks their name on caller id ( shows as private caller ). I located the business name by using on-line acct management tools provided by my the telephone company. I informed this company that the person they are asking for is unknown to me. I also informed them they are violating telephone consumer protection act by blocking caller ID. I then spoke with a supervisor and demanded they remove my phone number from their system and cease and desist calling the number as I am not the debtor. I continue to receive calls from this company with blocked caller ID. Last call received XX/XX/XXXX was from an abusive representative who said she did n't care that I asked not to be called and she was breaking no laws. She hung on me when I asked to speak with a supervisor.