OP, I don't know where this thread is going.
To split the two distinct elements again:
Do you owe the council £205? Yes. They went through the enforcement process to the point of your appeal which you lost. There's nothing you can do about this within procedure because none of the procedural grounds applies. Whether you received a CC and OfR is not relevant IMO because these aren't grounds for submitting an SD anyway.
You did not receive the Penalty Charge Notice in question; but you did,
You made representations to the Enforcement Authority concerned but did not receive a Notice of Rejection from that authority; but you did,
You appealed to the adjudicator against the rejection by the Enforcement Authority of your representations but had no response to the appeal. But you did.
As regards the enforcement agent's fees, IMO this is a different matter but there is no adjudicator to help you here so you sit outside the enforcement process. I hope bailiffonline might be able to help.