DFAS Debt

I separated on Jan 5th of this year and had received a DFAS debt notification for an overpayment. I’m only 19 and for almost 6 months of applying everywhere and getting 2 interviews, having no money. it’s hard for me to make 50$ payments when I have other needs. Is there any way to get this removed or lessen the debt? It’s only 500$ but it’s making my life a living hell. Please I need help anything will do.