I was on vacation in February 2019, I bought some headsets and when I arrived in my country (Argentina) they were defective. The query is, to what email address I can send the claim. Thank you

I think it is better that you communicate with the manufacturer's warranty, because sending them from Argentina will be to your account and you have to see how much time it took to see if they make the return that can only be done if the card was purchased and You send the ticket or if you have someone there who takes care of the entire transaction.

You have to Google where you bought it and from there on the web you will learn more