Loans cancelled, owed back to school?

I graduated in 2025. Sometime last year I noticed my student loan balance dropped by almost 5k. I did a few things:

– I called my loan servicer to inquire and they said a few loans appeared to be paid off, and theres nothing they can do about it since they just manage the funds.

– I checked my FAFSA.gov loan info page and it said those loans were “Cancelled”

– I check my school’s student financial portal and it says I owe them the exact balance that was cancelled and more.

– I called my financial aid office and the representative told me that “whatever” (and I’m not sure what it is) transpired was a mistake, and I don’t need to pay it back.

This balance has been past due to my university since November 2025. Since then I’ve already received my tax refund and my wages haven’t been garnished. Is it safe to assume that I won’t be slammed with a massive bill down the line? I feel like I’ve been cheated because I never asked for these loans to be cancelled or to be “paid off” by my school, it all just happened without my knowledge.