There can be many reasons for YouTube to issue a monetization ban on a channel, usually because there was a violation of their policies or terms of service, or because of recurrent violations. You can learn more about the demonetization of a channel here. If this happens, it's unlikely that YouTube will go back in their decision, but there can be mistakes.
If you believe that your channel abides by all YouTube policies and terms, and you have already appealed to YouTube and got denied, get in touch with our support team, and we will try to understand what can be the potential issue that YouTube found in your channel. Depending on the situation we may be able to help.
To get in touch with our Freedom! support, click in the "Submit a request" link at the top of this page or click here.