I would verify the date of first delinquency of all your accounts (the month after the last payment you made), do this with the original creditor and not the collections agency.
You might find that some of the items are actually past 6 years already and should be wiped fromy our account. If are past 6 years, ask the original creditor to send you proof.
If they do....start writing dispute letters to Equifax and Transunion witht he letters attached, in my experience it takes about 2 -3 letters before they will fix the account.