after making purchase

after making purchase I want to arrive a text with some data to the user. where is that file?

Possibly includes/languages/english/html_includes/YOUR_TEMPLATE/define_checkout_success.php

thanks for the reply , after confirm purchase the new edited message appears here, I want it reaches the mail along with information Cart

To provide information in the email that is sent to the customer upon purchase requires modification of the includes/classes/order.php file look for function send_order_email(

And in that area is where content can be added/modified to provide to the customer.

here is screenshoot

Use tools->Developer's toolkit and search for that text... Either it will appear as a defined constant in a language file

define('CONSTANT','Mensaje editado.');

Where CONSTANT would be the applicable variable for that text, or it will appear in one of the template files. You could then look for the CONSTANT and see where it is used and if that location corresponds with the template location identified above in the image.