Some ebay seller is fighting me right now saying they’ll block me if I demand a refund over them sending me a materially different condition item than what was

Some ebay seller is fighting me right now saying they’ll block me if I demand a refund over them sending me a materially different condition item than what was pictured. I’m totally fine with never transacting again with them. I’ve never had a good AirBNB experience. I’d never miss them if they went away.