Hi, on info page, information regarding the closed order is displayed. There can be different messages displayed based on order status - these are mostly set in plugin.
You can paste specific messages per language override (in Joomla! language override options):
and it will be displayed on info page:
There are specific messages for specific statuses
COM_PHOCACART_ORDER_PROCESSED_ADDITIONAL_INFO=""
COM_PHOCACART_ORDER_PROCESSED_DOWNLOADABLE_ITEMS_ADDITIONAL_INFO=""
COM_PHOCACART_ORDER_PAYMENT_PROCESSED_ADDITIONAL_INFO=""
COM_PHOCACART_ORDER_PAYMENT_PROCESSED_DOWNLOADABLE_ITEMS_ADDITIONAL_INFO=""
COM_PHOCACART_ORDER_PAYMENT_CANCELED_ADDITIONAL_INFO=""
Or you can paste some static message there e.g. per template override:
components\com_phocacart\views\info\tmpl\default.php
BTW - I will add even info description to top of this site in next version which will be the same for all statuses.