I'm sorry but we won't know why you were banned from the forums. Can you take a look through your emails? There should be an email from Terms of Service that shares the general rule broken for example: ban applied for cheating/hacking/hate speech/etc. This article shares more about Apex and the rules: "Play by the rules in Apex Legends".
In terms of hearing back on the appeal results, the Terms of Service team carried out an investigation into ban internally and let you know which result applies to your case. i.e: the investigation showed that the ban was correctly placed and will remain in place. If they have denied multiple appeals to overturn the ban then I'm sorry to say that there is nothing that we can do to change this.
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