You must write your own appeal. Staff cannot write it for you, but they can review a draft and give feedback.
Top tip: Just start writing. It’s easier to get all your thoughts down and then edit, rather than try to make it perfect from the start.
If you want feedback, send your draft as early as possible- ideally at least 1 week before your deadline. Staff may not be able to give feedback on multiple drafts, especially at busy times.