Copyright on Freepik

I received a legal notice from a Brazilian photographer on Freepik who said that, given Brazilian laws, I have to put credit on the photos, even though the license says I don't need to. He is not complying with the platform's terms. I also discovered that if I download a photo twice I lose the previous license and only have the new one. This left me in trouble. How do I report it? Is there a specific channel?