By default, all billing-related communications happen to all the admins of your account. You can make a user an admin by following the steps here.

Non-Admin/Non User: If a Person/SPOC is not a user of the account, You can add the Email ID of the SPOC (if they are not an admin)in the Service disruption Email and Bill Email Address Section to receive downtime and Billing related notification emails

And, by chance you want billing communications to be done to your billing department or if you want the service disruptions/downtime emails to go to your tech department, you can do so by specifying these emails in a comma-separated format here:

Reach out to us at 8088-919-888 for any concerns.