The customer service/contact page contains a few content modules you can customize via the theme settings.
This content is added via Content > Pages > Customer Support (FAQ).
The contact form is a default form from Lightspeed and does not have any specific settings.
The contact info section is an optional section you can use to display company information or anything else you may see fit (ex: Business hours). You can edit it’s content under Design > Edit theme > General: Advanced > Service/Contact page.
The FAQs are added under Content > FAQs and you can add as many as you wish.