We'd like to look into it. Just to confirm, was your channel monetized earlier and now demonetized or is it the first time you've applied and were rejected? Keep us posted.
Appreciate the info. While we can't share specifics, we recommend going through YouTube Partner Program policies and make necessary changes to your channel. You can re-apply in 30 days. More info: https://yt.be/help/AsbB . Hope this helps clarify.