Just to confirm, was your channel monetized earlier and was demonetized then, or was it the first time you applied and were rejected? Also, please share a screenshot of what you’re seeing on this page: https://goo.gl/297Xrv ? Keep us posted.
While we can't share specifics, if your channel is out of compliance due to reused content, it means the content is not original/auto-generated. Here's more about reused content & how you can avoid them: https://goo.gl/E5dgGo