I.C. Systems continues to call me and send letters requesting a balance for XXXX XXXX XXXX that I do not owe as it was never set up nor installed. I have a CANCELLATION CONFIRMATION NUMBER FROM XXXX XXXX proving I have a XXXX balance and that an account was never set up. The ACCOUNT CANCELLATION NUMBER GIVEN TO ME BY XXXX XXXX IS : XXXX. I have mailed XXXX letters asking them to cease communication and validate the debt and they are unable to provide me with this information.