Overpayment letter from the unemployment office - first time posting

After 9 weeks of benefits I got a notice saying I must repay some of it. I do not usually post, so bear with me. 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.

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