Now, I do not speak for JJB, but generally speaking one of the things staff members look for in apologies is some sort of acknowledgement or proof that the apologizing user has read and understood the rules. Now, here is one of the rules for Punishment Appeals as listed on its corresponding forum thread.
By using ChatGPT, you basically show that you either did not even read the Punishment Appeal rules, or that you did but ignored them anyway. In any case it is unfortunately not a good look on your end.