Just make sure you have made changes to your website before applying for appeal, tell Adsense that you have made changes to your website and you will be extra careful in future that the same thing won’t happen again. Tell them the methods that you are going to use that will prevent you from the same issue happening again.
Don’t just write simple words such as you made mistake sorry, unban me blah blah. Be professional and you might have chance. Also one thing if you have already appealed then you have low chance of getting your adsense reinstated, you only got 2 chance if both failed then it’s over. Good Luck!