So it very much sounds that in order to pursue this, you will have to take matters to the tribunal and explain what happened to the adjudicator. I have never had a single case where an appellant has given evidence in person to an adjudicator and the adjudicator has said "
I don't believe you", but obviously all litigation carries an element of risk.
I would in the meantime make a request to RingGo for all logs that they are able to provide.
I also had a look on the council website and found this:

So have you paid the penalty, and if so how much did you pay?