Deleted active site

Something wrong with my site
It’s deleted and i can’t understand why. It was active site. Why can be deleted sites?

Thank you for help.

kursenugc is deleted after being suspended for 7 days.
I can see a mail was sent to the address on the date of suspension giving information how to appeal.
Users need appeal within 7 days to avoid deletion.
In this case no appeal was found hence deletion.