Hi Abu,
Thank you for your interest in wpdatatables.

As we know Contact Form 7 by default is not saving data in database. You will need some additional plugin that will do that for you. There is a lot of them but you can try this one.

When you have data in database(tables) then you will be able to pull data from that tables and to make wpdatatables from SQL queries. 

Please note: Using this plugin feature requires at least a basic knowledge of SQL. It is assumed that you can create the table in some MySQL data manager (e.g., PHPMyAdmin, MySQL Workbench), and prepare a SQL query that will return the data you need. If you do not know how to use MySQL, refer to the “Create a MySQL-query-based table by generating a query to MySQL database” section. It will explain how to create complete tables or MySQL queries without this basic knowledge. Please be advised that preparing MySQL queries for you is not included in the plugin support, but it can be done as a paid customization service.

When you made wpdatatables then you will be able to Create charts from those table. Please note that charts accept only one string type column(string, date, datetime, URL...) and all other have to be integers or floats.

Best regards.