Unauthorized Usage — $1,444,125+ Charges, NO Human Escalation

Hi OpenAI Developer Community, I need help understanding how to escalate a serious issue. Our Blossom Flower Delivery API account suddenly had abnormal usage starting around the 6th. The usage does not match our normal workload and appears to be unauthorized activity using many different models. Our normal OpenAI API charges are usually up to about $2,000 per month. This sudden spike to more than $1,444,125 is completely abnormal and impossible based on our normal business usage. We revoked the affected API key immediately and contacted OpenAI Support several times. We have now been waiting more than 20 days, but we still have not received a meaningful reply from any human support agent. This is extremely urgent because of the amount involved. Has anyone dealt with a stolen or compromised API key at this scale? What is the fastest way to get this escalated to OpenAI Security/Billing or a human support manager? I am not posting private keys, logs, or billing screenshots publicly, but I can provide everything directly to OpenAI through a secure support channel. Any advice from the community would be appreciated.