Cannot access WordPress control panel

Please can you help?

I set up a domain, harrisocialmediatest.com and installed wordpress in the root directory. Everything was working fine.

I then pointed the DNS server from Dreamhost to MediaTemple servers, and the DNS is correctly resolving to the MT server.

An important point is that I changed the root folder name from harrissocialmediatest to harrissocialmedia

The site does not read wordpress because several files, css & javascript files are now linking to an incorrect path, so I want to set up things in the control panel.

However, when I try to login at https://harrissocialmedia.com/wp-login.php

the login page redirects to https://harrissocialmediatest.com/wp-login.php

and I get an error: Forbidden You don’t have permission to access /wp-login.php on this server.

So for some reason WordPress is redirecting to harrissocialmediatest.com

I need all the relevant files to become harrissocialmedia.com

I am happy to use phpMyAdmin or direct FTP to update the files.

Please can you help.

Thank you.