A company using an Azure Sponsorship program mistakenly believed their use of Claude models through Azure AI Foundry was covered by their sponsorship credits. They discovered that Claude is considered an Azure Marketplace charge, which is explicitly excluded from sponsorship. This misunderstanding led to approximately $22,000 CAD in direct charges accumulating within three days. The company states they received no clear warnings during deployment that Claude would incur separate Marketplace costs or that their sponsorship would not apply. They also mention that their configured budget did not provide a timely or meaningful alert about this unexpected spending. The discovery of these charges was almost accidental, raising concerns about how much higher the costs could have become. Their attempts to resolve this through Microsoft support have been frustrating, with difficulties in creating appropriate tickets and receiving generic or unhelpful automated responses. Some recommended cost management tools are also reportedly unavailable or limited under their legacy sponsorship subscription. One support ticket was closed without resolution, exacerbating their concerns. The company is urgently seeking to escalate this billing dispute beyond standard sponsorship support to reach an authority who can review the circumstances. They are looking for guidance on how to dispute Marketplace charges under exceptional situations and escalate unresolved support cases. Ultimately, they wish for a review of their situation, emphasizing they are not trying to evade legitimate costs but are seeking assistance due to a lack of clear warnings and a challenging support experience.