Debt collector Credit Systems International , Inc. ( " CSI '' ) falsely reported to XXXX and XXXX that I have an unpaid medical bill. In fact, their client, Texas XXXX XXXX XXXX ( " XXXX '' ), was paid in full for the medical services and supplies that it provided to me, but XXXX fraudulently billed for the same supplies twice. I do not owe the amounts reflected in the XXXX-billing. However, instead of resolving the issue, XXXX hired CSI to collect on bogus charges. I have disputed these charges to all concerned, but CSI failed to respond to my letter and instead, placed negative information in my credit files at XXXX and XXXX.