Defaulted, then approved for rehabilitation but monthly payment is too high

Hi all – my wife's loans defaulted last month and we applied for loan rehabilitation. She got approved today, but the monthly payment is $317 – I'm a PhD student who makes pennies and she works for a nonprofit. There's no way this was calculated using our actual incomes.

Is it possible to respond requesting a lower payment? My wife has a lower paying job than on our tax return for last year, too, so I assume that's part of it.