hi @Mustafa Anil Diktepe 

Sorry to hear about your issues. Here is a Help Article that outlines a few steps you can do when the admin leaves the company. Good luck!

@Mustafa Anil Diktepe - Here’s a post I put together a while ago with a few options, with the one in your control being to: create a new free plan team, add all users to the new team, move the boards over, and then leave the old team.

https://community.miro.com/inspiration-and-connection-67/article-taking-back-control-of-your-free-plan-team-7706