What is still reporting on the old tradelines? Any notation or reference to the default should be removed from the accounts, and the tradeline(s) from the collection agency that did your rehab should also be removed. What can remain are the lates that lead up to the default, which may be why the accounts are still tagged as negative.
If all that remains is those lates, your options are a GW letter or to just wait for them to age off. Any default notation should have been gone when you finished rehab though, so you can clean that up by contacting the lender with proof of your rehab, and if that fails, disputing and/or talking the ombudsman.
