I booked a flight with Expedia long before Covid hit. I began requesting a refund in March for a trip in May. Expedia refused, and issued a voucher that expires later this month. We are older and won't be traveling anytime soon, so I asked for a cash refund. Expedia said it was up to Aer Lingus. Aer Lingus replied that it is up to Expedia again. Expedia again put it off to Aer Lingus, who, once again, replied it is up to Expedia. The Expedia agent said there can be no refund. Please help me out.