An Azure service that is used to implement corporate governance and standards at scale for Azure resources.
Hello @Rezero
The AADSTS16000 error is consistent with signing into Azure with a personal Microsoft account (live.com) that lands in the restricted “Microsoft Services” tenant. That tenant doesn't provide the directory/subscription permissions the Azure Support portal requires, which also explains the “You do not have access permissions” message. Microsoft moderators have documented the same behavior with personal accounts.
This appears to be a support access issue that occurs before your Azure for Students eligibility can be reviewed, rather than evidence that your CHSI documentation has been rejected.
Since you can't create a support request through the portal, keep this Q&A thread open so Microsoft staff/moderators can help escalate it or request the required information through a private channel. Do not post your CHSI report, student ID, QR code, email address, or other verification documents publicly here.
Also, I don't recommend creating/purchasing a normal Azure subscription simply to get around the support portal. The actual requirement is to resolve the Azure for Students verification/account onboarding issue.
Your request for a Microsoft moderator to route this to the appropriate Azure subscription/verification team is reasonable, given that the normal support path is currently inaccessible.