Given that refunds for goods and services are generally much more difficult in Latin America than in the UK, given that this is Argentina where things are generally more difficult than in the rest of Latin America, and given that this is Aerolineas, notorious for spotty customer service, I'm guessing that it will be nothing short of a miracle if you are able to get any refund at all. But I guess it doesn't hurt to try.

You may have better luck with Latam but don't expect an easy ride there either.