Urgent!!! Deleted mailbox?

I thought I was helping a client clean up spam when I used the mail manage plugin to delete the mail from his primary account (I was assured it was all spam).

But now it looks like all mail has been deleted from all accounts.

Is there any way I can get this back?

When I navigate to the site's control panel, click on mail, then accounts and show disk space used I see the accounts are still using space, however when I go to web mail and open one of the accounts no mail is there.

If anyone can help I would GREATLY appreciate it!!!

 

No chance to recover this otherwise?

I'm curious why cpanel still reports the space in use but I can't see the emails.