@TeamYouTube my channel got demonetised. But my channel just got monetized a month ago and after one month youtube demonetised my channel. All my contents are gaming contents created by me. I think it was a mistake from YouTube.
Channel link:https://www.youtube.com/rexcoberry
You should have received an email and a message with more info in Creator Studio. Take a look at the detailed resources and note that you can always reapply for the YouTube Partner Program again in 30 days.