Plesk doesn't work anymore

Hello,

I have a "big" issue with Plesk (12.X, Windows Serer 2012).

To be short :
- The sql quota limit has been reached and my domain suspended by Plesk.
- I fixed the issue and activated the domain, and had to configure again all my mailboxes.
- One mailbox was not working, since it was a support mailbox I chose to delete it and create it again.
- I've deleted the mailbox using mailenable (right click -> Delete)
- I went in Plesk and found that my mailbox was still there and tried to...

Plesk doesn't work anymore