In this instance, the interest that accumulated on your loans is added to the outstanding balance of your loans when you entered forbearance/stopped collections. This does mean that the amount you pay in the future could be higher than you initially thought
What happens in the situation that I filed an application for borrower defense outside of the applicable limitation period, or indeed, if my loan payments re less than the amount owed after my discharge is applied?
In this case, you will not be eligible for a refund of payments, as you loan servicer will not apply any previous payments made on the discharged loan or return any made payments to you
What does it mean to be granted a partial discharge on my federal student loan?