You can use File Manager from Cpanel.Just login to Cpanel and use File Manager to upload files to public_html folder.Or you can use FTP.For FTP use FTP client like FILEZILLA.
For more info http://x10hosting.com/wiki
Your account is Suspended under Zero Tolerance Policy.We don't delete such accounts manually.You have to wait for its automatic Deletion.It may take 14 days or more