Done everything, they still track me?

If you’re able to stream with Mullvad, you don’t have the security level settings high enough to prevent browser fingerprinting. Go into settings and select a level of safer or safest. The lowest setting can still give up things like language, time zone set on your machine, fonts, etc. However, this will break many sites, including streaming sites, because it will prevent JS from loading. Which is fine, that’s how it’s supposed to work. But it’s also something you have to balance out in terms of how you want to use the internet vs. what level of privacy you need to maintain. You can either spend time right-clicking and allowing JS on some sites temporarily and only use one browser for everything. Or, alternatively, use another browser and another VPN location for anything you need to be logged in to see, and/or streaming sites alone. That creates one browser that’s the one that works on every site and gives up data, and then a safe space back in Mullvad. There’s a balance between security/privacy and convenience, and you need to find where you personally fall on that spectrum.