If this is a serious appeal, then you’re better off posting it in the eac forums on steam. Or at least posting a link here to your steam profile.
If you were eac banned (game banned) then I can almost absolutely assure that it was no accident, you were caught with a known rust hack running in your rust memory. However if an eac dev sees this post they will be happy to do a quick manual check on your ban to make sure. (If you post your steam id).
If it was a server ban from an official server then there’s absolutely nothing you can do other then find a new server. A FacePunch employee wouldn’t just server ban someone for no reason, so there’s practically no chance at all of being unbanned.