Get Support for Apple Business Manager
You can get support for Apple Business Manager through various Apple resources:
Upgrade your organization to Apple Business Manager (if you previously enrolled in Apple Deployment Programs).
Contact Apple for support and service (for help with Managed Apple IDs, managing devices, and deploying apps).
AppleCare Professional Support (for IT departments).
iTunes Store Customer Support (for help with volume purchase accounts and billing).
Call your local AppleCare Enrollment Support number (for help enrolling in Apple Business Manager).