I use the US version of coinbase. You just go on there and buy usdt using your debit card. Then I walk into my local crypto broker. The advertise right on the side of the building as a broker of criptomonedas. They text me a long ass code. I go into coinbase on my phone, select send crypto, I select usdt and the amount and then paste the code into the text code and hit send. 5 min later I walk out with cash. They also will straight up buy dollars from you, today's rate was 353 when I changed. I'm trying to redu e my dollars because I'll be leaving soon so this works out better. No fees or time wasting or anything. I don't live in Buenos Aires so I don't have any suggestions for the city.