I.C. System, Inc. Debt Collection Complaint

I.C. System, Inc. Debt collection department,

Other (i.e. phone, health club, etc.) Cont'd attempts collect debt not owed Debt is not mine Wisconsin

Collector says I owe money for additional plumbing services. I paid the plumber in full and on time ( have receipts ). I immediately asked collector to validate the debt and to communicate only in writing. I have never paid a bill late in my life. Despite my poor finances, I offered collector $100.00 to make the issue go away. This seems to have emboldened them. Collector reported the fake amount to credit bureaus, plunging my FICO score. If my future employer orders a pre-hire credit report, I may not get the job. I moved out of state ( to save money ) and filing legal action there would be an unmanageable hardship. Today a collector harassed the receptionist where I work.