Still get the This website is temporarily unavailable notice.
Oops! The webserver is unable to connect to the database server. It could be busy, undergoing maintenance, or simply broken. You should try again in a few minutes or contact the website administrator.
The database reported the following error message:
SQLSTATE[HY000]  Connection refused
That means the information you put in config.ini.php is wrong. You will need to get your web host to help you fix that.