Hello @ETURAC  the translation tool says you want to "Delete the organization because, as an administrator, I no longer have access to it.:  Is that correct?  This article is focused on Free Teams but if you do a search on "delete organization in Teams," you'll see several videos and other articles.

 

https://support.microsoft.com/en-us/office/delete-your-teams-free-organization-2c28cfcf-3fbf-497c-93...

We support Ukraine and condemn war. Push Russian government to act against war. Be brave, vocal and show your support to Ukraine. Follow the latest news HERE