Overpayment letter from the unemployment office

After 24 weeks of benefits I got a notice saying I must repay some of it. The letter mentions an appeal window and a repayment plan. Who should I talk to first?

Read the letter for the appeal deadline and act on it, even if you think you will end up repaying. Then ask about a payment plan.

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.