That's it for me -- I'm going to dispute the charge with Chase. easyJet is dragging its feet. I get why they're doing that, and perhaps they'll get why I'm not gonna wait for the refund option.

ETA: Very nice agent at Chase USA. She issued temporary credit for my charge. easyJet now has 30 days to contest it. If they do, then Chase will get back to me to ask for supporting materials. If easyJet contests this charge, that would be very bad faith on their part. Their CEO said my flight and all April flights are cancelled. There is no basis for them to keep my money -- they are legally obligated to refund it, and not whenever they feel like doing so.