Harassment on prescribed account

Firstly I am not happy that this company is calling my work number as they have all their info incorrect I called DMC trying to understand why do I owe on a direct Axis account which was closed over 5 years ago and to my surprise the consultant never asked me to verify my ID but she gave me my complete ID number then too top it off I request to speak to a manager too understand why and what is happening the manager or sales leader Kerlynne Treasurer was also trying to justify instead of explaining or getting info back for me. I mean all she did was check up on my credit status of accounts and mentioning that thinking I would fall for this nonsense I would appreciate it if these