Aerolineas Argentinas They unilaterally changed the date of my flight without my permission to an impossible date and refused to refund me Buenos Aires Florida

I purchased round trip flight JFK-EZE on 11/27/22 (depart flight 7/16/23 return flight 7/25/23).  Without permission, on 5/26/23, they changed my return flight from 7/25/23 to 7/24/23 (& I can’t fly on 7/24/23).  I unsuccessfully tried to contact them today (5/30/23) at (305) 648-4100 and kept getting disconnected waiting. I emailed the CEO, pablo.ceriani@areolineas.com.ar, and then received a response from Patricia Basiliades, who instructed me to file the claim online and then to email Ivan Marin (ivan.marin@aerolineas.com.ar) my new credit card info for the refund.  I filed the claim and provided Ivan the info.  Ivan refused to issue the refund.  I had to purchase new tickets for the original travel dates through a different airline, because my dates are not flexible.  Aerolineas had no right to unilaterally change my date of travel to a time that I can't travel and then refuse to refund me, especially after promising that they would. You can't trust this company!