Overpayment letter from the unemployment office after 3 years as a warehouse supervisor

The agency says I reported earnings incorrectly, but I think I followed the instructions. I am in Atlanta, in case local advice matters. I cannot afford to repay it all at once. Who should I talk to first?

If you are unsure, free legal aid in your area may help for this kind of notice.

I asked for a waiver and a plan in the same call, and they gave me both forms. It was less scary than I expected.