Harris & Harris, Ltd. Debt Collection Complaint

Harris & Harris, Ltd. Debt collection department,

I do not know Cont'd attempts collect debt not owed Debt is not mine Colorado

I have been plagued with repeated calls from a debt collection company called Harris and Harris for close to a year. They call both of my land lines, often more than once a day, usually both line and a few times every week. Sometimes they ask for my son, who does not live here and is not connected to my address or phone numbers other than by last name. I have returned their calls and spoken with someone telling them that he does not live here and they need to find him on their own. If I see him I will give him the information but to stop calling me. To date, nothing has worked, I was called twice yesterday and so far once today. The phone numbers are - - and - -. Can you help please?