I want my report fixed

I have found on Transunion website as part of their general information that if you have a payment arrangement in place and been paying it that the negative payment profile gets removed however I have been told by Transunion agent that this is not true, so how do you advise people regarding their debts but you then say that the information isnt so. I now have sent this to Experian, COmpuscan and XDS. The NCR and Credit Ombuds