purchasing of closed account and harassing's me also listing me as bed payer on ITC

This is an ********* company that is purchasing prescribed/ and closed debt or even debts that don’t reflect on your credit report and without any proof claim that you owe money to some company, NIMBLE GROUP listed me on ITC claiming i am owing them R8059.00 and where they purchase the account that account is closed long time and i do have prove of few cradit reports that reflect the status of the account as closed, now NIMBLE GROUP doubled the amount was owing with the old and closed account , please NIMBLE remove your information to ALL credit record company, i so you already removed on one company that logged dispute, i want you to remove your company on all credit ITC, i don't owe you