Overpayment letter from the unemployment office - 16 weeks in

After 16 weeks of benefits I got a notice saying I must repay some of it. I am in Wichita, in case local advice matters. I cannot afford to repay it all at once. Who should I talk to first?

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.