Thanks pdcarg77, for your post above, your information is very helpful.
I am waiting on a flight refund as well. I received an email from Aerolineas Argentinas on 20 March with the subject line "Important. Your flight has been cancelled or modified" and it listed various contact centres around the world to call for assistance. I am in Australia and phoned the local number. I talked to a very helpful person on 20 March who is based in Sydney, Australia, who directed me to the link on the Aerolineas Argentina website to request my refund. (My flight on 8 April was cancelled.)
I requested the refund from the website on the same day and received an automated email response with subject "Devolución en proceso" and the email said "Su solicitud esta siendo procesada." Google translate says this means "Your request is being processed." in English.
Since 20 March, I have not received any further emails and I have definitely not received a refund.
My original ticket was booked through the Aerolinas Argentina website, on an Australian credit card.
@pdcarg77 you wrote in your post that Argentina is on lockdown until 10 May. Does this mean we should expect no refunds to be processed until then? I was going to give this a few more day then request a chargeback on my credit card. It's been 6 weeks since my request was being processed by the airline.
Any advice would be appreciated.