Education

I don't have topic 203 but I did have to verify my identity about a week ago. When I called back to see why my bars weren't showing up three days after verifying, the customer service rep said she saw an offset. My taxes were taken in full last year because of a student loan. When I checked Credit Karma the debt is all cleared except for $80. I called the offset line and it says no offset found. Is there another number I can call to get the correct answer and who I owe?