My son has made an appeal to AQA on the basis of marks awarded on a question in chemistry paper 2 in June 2024 exams. The reason is that we saw the exact question in a marking scheme for 2017 and the official marking scheme. However the board has responded that the appeal can not be based on another's year marking scheme. but 2024 marking scheme is not yet available. the window on appeal is closing on us. please what can you advice.?