Just to confirm, is it the first time you've applied and were rejected or your channel monetized earlier and now demonetized? Also, please share a screenshot of what you’re seeing on this page: https://goo.gl/297Xrv
We review all applications carefully–if you weren’t accepted into YPP at this time then check your Monetization page in Creator Studio for more info: https://www.youtube.com/account_monetization …. You can make any changes based on those details and always reapply after 30 days.