I.C. System, Inc. Debt Collection Complaint

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

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

Earlier this month, I received notification from my credit monitoring service that my credit report had changed. Knowing that I had n't filed for any new credit, I was immediately concerned about this. I checked my notifications only to see a account late notice on my report for a debt. I have no idea what this late notice corresponds to and I am not behind in my bills. I have not received an notification from the company regarding this alleged debt that I owe. My scores have dropped over -pts, to -, due to this alleged debt. This is utterly unacceptable!