I recently had to utilize the Defense of the Consumer service from the City and while it's not yet resolved, it did get Samsung to finally take my warranty claim seriously.
I purchased a TV on MercadoLibre, and after 30 days the TV started displaying inverted colors. I did some Googling, and apparently the T-CON board is shot (or in the process of deteriorating). There was no physical damage to the box it came in, or on the TV, and it's a shame as I love Samsung's products over all (and Argentina is a sweet spot for Samsung deals, they just ship the parts from Vietnam/China/Korea to Rio Grande, TDF and assemble them there and claim "Industria TDF" so you basically get the same product you would from the US but for a fraction of the cost).
Unfortunately like everything Argentina, customer service doesn't exist, and every time I called, messaged, emailed Samsung they gave me the run around saying "Well, if a factory reset fixes the issue, the issue is resolved and there is no claim". They refused to acknowledge a new TV shouldn't have to be randomly factory reset every couple weeks to make it work, pero bueno. I made the claim online for the Defense of the Consumer and a woman at Samsung corporate started emailing me and we're organizing a date for a tech to come to my apt. It shouldn't have had to come to this, but if it gets my TV fixed, that's what I'm interested in, and my interaction with the city was one of the better government interactions I've had here too, prompt and professional.