Editing the Terms & Conditions in your template is easy. To edit them go to Joomla administrator. You can access Joomla administrator by http://yoursite.com/administrator.
You can edit these conditions with frontend editor. To use frontend editor, make sure you're logged in as Admin.
When you're logged in as a Admin, you will see the "Edit Page" button on SP Page builder pages.
Click on Edit Page to edit that page. In this doc we are editing the page terms & conditions. You can edit Shipping Policy, Refund Policy, Contact Us page and many more in the same way.
Now you can edit the contact directly. To know more about frontend editing, process to the following link: https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3#documentation-heading-1_2
You can also view the video for frontend editing here.