To remove shoppers access to support cases:
In NetSuite, go to Setup > Users/Roles > Manage Roles.
Click Customize next to the role you want to grant support case access.
Go to the Permissions tab and the Lists subtab.
Delete the Cases permission with Edit level.
Click Save.
By doing above steps the cases tab will get remove from webstore.
To assign a credit card processing profile to your Commerce web store:
Go to Setup > Accounting > Payment Processing Profiles.
Click Edit next to a profile.
Select one or more websites from the list in the Web Site field.
Click Save.