Overpayment letter from the unemployment office after 6 years as a retail manager

I received a letter saying I was overpaid about $950 on my claim. I cannot afford to repay it all at once. Who should I talk to first?

Collect your pay stubs and certification records for the weeks they name. Mine showed the error was a date mix-up.

Thanks for writing this out. I went through something close to it 11 months ago, and it settled down once I kept a simple log of every call and form.