Collection Agency in Eden Prairie, MN.

Central Portfolio Control, Inc., a Minnesota corporation
6640 Shady Oak Road, Suite 300, Eden Prairie, Minnesota, 55344.

The person uses a name of "Dave Michaels" (at least one of the times)

Write them a letter, make sure you RECORD all phone conversations and if they continue to call, call the Eden Prairie Police and complain you wrote them a letter (cease and desist) and they continued.
Do it in WRITING.

Some of the Minnesota Statutes are:

609.749 HARASSMENT; STALKING; PENALTIES

Regards

The Laughing Man