INCORRECT CREDIT BUREAU RECORD

I had been a Jet Stores account holder for a number of years. With the break up of Edcon my account was passed on to Nimble for collection. Payment arrangements with Nimble were duly made. My account is paid regularly. However on checking my credit record with Experian I noticed that both the Jet account as well as the Nimble account is reflected. And because the account is paid to Nimble, the Jet account reflects as missed payments which in turn negatively affects my credit record. I have taken up the issue with Nimble who state that they are unable to correct the situation. This after the account was passed on to them. This situation is unacceptable as the matter should be resolved between Nimble and Jet with the credit bureau being informed accordingly. The credit bureau states that the account must be corrected by the company who has the account.