Demoted 2 weeks too soon, No warning either.

So i was demoted today and I'm not really sure why. It's not a huge deal to me since I'm confident i can climb back into diamond fairly quick but i think people should know about this and rioters should see it so I'm making this post. This is my account: https://na.op.gg/summoner/userName=Activeforce5 I played a game like roughly 2 weeks ago, not my best game since auto filled but regardless i took a picture of my current time and when the game was played. Not sure whats going on here but thanks for checking it out if you got this far. Let your friends know to play a game if they haven't in 2 weeks, would kinda suck if other people got demoted as well. Gl on the climb everyone :)