$17,493 in Undisclosed Marketplace Charges with No Cost Visibility, No Recourse, No Accountability

Same situation here, October 2026. Two-person company in Norway on a Microsoft for Startups sponsorship. We deployed Claude in Foundry in August. About USD 17,600 was billed to our card as Marketplace usage while the sponsorship portal showed USD 21,168 in unused credit. The credit expired the day after we found out.

Microsoft support told us Anthropic must approve a refund. Anthropic told us in writing that no publisher approval step exists and that the decision is Microsoft's. Our last request for escalation to the Startups program team was closed by an automated reply on 15 September.

Full write-up with screenshots, timeline and a list of the other public cases, including several from this thread:
https://vegalabs.no/azure-claude-billing.html

TrackingID 2609120050000136. If anyone from Microsoft reads this: we are asking for one person with the authority to decide.