You will need to have a lawyer review the exact allegations, and the ordinances involved. I expect that upon review the lawyer will find the mechanism for review within the county, and also explain how you can take an unsatisfactory resolution to court.
All we can do here is work with the information you share with us, and we don't have enough information to point you in any given direction. If we assume that you're correct that the county can simply declare somebody guilty of an ordinance violation and not allow for any review or appeal of that determination, your next step in defending yourself would be to litigate - but if you file a lawsuit without exhausting your administrative remedies you are unlikely to prevail (you should expect that such a lawsuit would be dismissed as premature) and will incur unnecessary costs and delays. The detailed facts and actual ordinances are important to a meaningful review.

