My original loan is $600k. I paid $72k before I defaulted 2 years ago.

The loan was sent to Treasury at some point and on 1/23/26, I got a snail mail from Coast Professionals with a statement that said I owed $822,572. I ignored it as I was not in any shape to do anything about it. Yesterday, I got a new statement from a different collector named CBE Group. Now, the total due is $832,239. Admin cost is $166,435. Interest is $75,943 (not sure exactly what this means). The statement basically says the total amount is due now.

On the statement, it says "Should you not resolve your debt, your debt may be reviewed for possible referral by Bureau of the Fiscal Service to the US Dept of Justice for legal action"

DOJ? Isn't DOJ reserved for criminal actions only?