run the uninstall.php script which is in the same filder then the install script that you usedt o install ispconfig 3.
Hi There, One tip! I you some how can't find the uninstall.php like me just unpack the tar.gz and go to the install directory where you wil find the magical uninstall.php Jesse
The script removes the ispconfig database and withoztr this database none of the services like mail or ftp will work anymore.