Note that Giacomo confirmed later on Twitter that he contacted Athena and got the funds returned without issue. Not good of course. But just a technical issue that got dealt with, not fraud. That ATM happens to be right next to the sea so wouldn't surprise me if they're still figuring out equipment reliability issues.

Re: Chivo in general, lots of people think it's not very good. In El Zonte merchants mostly use other (Lightning) wallets. Though the few times I've paid to Chivo wallets it has worked.