Hello,
The documentation available on http://old.phpdocx.com/api-documentation/word-content/add-chart-Word-document-with-PHP, is for the latest version of phpdocx 3 (version 3.7, as you can see at the top of the page). So if you are using phpdocx 3.3 some samples, options or methods may vary, to get the exact available options for phpdocx 3.3 please check the phpdoc and samples included in your package.
As your username isn't tied to any license, for further support please send to contact[at]phpdocx.com the username or e-mail of the user that purchased the license.
Regards.