Step 1:- If You have to update content as given in the screenshot.

Step 2:- Go to the addon hostx, then click on the menu and after that click on the page manager.
step 3:- Search for index.php in the search bar and click on the edit button as shown.
step 4:- Go to the homepage 1 pricing header and click on the pencil icon to edit.
step 5:- Then enable the status of the block so that value will fetched from database.
step 6:- After enabling click on the view and the on the source code.
step 7:- Now you will see that its your company name enter in WHMCS setting this variable have value you can add static one heading too.
Note:- Description below you can change here as shown in the picture.
Step 8:- After changing click on the OK button the click on the Update button to save the value in the database.
Step 9:- Now you can see the changed value.