The Affiliated Group, Inc Debt Collection Complaint

The Affiliated Group, Inc Debt collection department,

Cont'd attempts collect debt not owed Debt is not mine Nebraska

Received a letter from Affilliated Credit Services dated -/-/- stating that I owe $160.00 with fees due a check written to - -. The letter states that the check was written on -/-/-. I have not written a check nor been in a - retail facility in at least - years. Upon contacting ACS, I learned that the routing # for the check was that of - - Bank. I had an account at said bank at - time but it has been closed for at least - years. Further, the check # was - digits long and any old checkbooks someone might have found would only have had checks with - digits. Please advise me as to how to proceed. Thank you,