I know you must be feeling pretty raw from the decision, but despite all the pressures of our Christmas preparations (we are, after all, unpaid volunteers
), Sally-Anne has taken time to give you some very good advice above.
From your description it does not really seem like a fair appeal to me. A good chair would have instructed the LA to find out the information about banding, and it would have been good practice at the very end to check with you "Have you had sufficient time? Is there anything you wish to add?"
See if you can get hold of the clerk's notes, but it sounds as if this could be worth taking to the ombudsman to see what he thinks.
(edited) ..... PS: As this was an LA appeal, I suggest starting with a complaint to the office that made the arrangements.
A happy Christmas to you ......