unsuccessful attempt to change domains- wordpress re-routing to old domain

The PHP is loading at the new domain, or else you would see no HTML. The issue seems to be that your WordPress Address (in Settings -> General) is not set for your new domain.

If you have access to the DB, look for the option with the name siteurl in wp_options. The value should be your new domain.

Quick and dirty solution: add this to wp-config.php:

define('WP_SITEURL', 'http://zoparealtygroup.com');