Anyone else get auto-downgraded off the 20× plan with most of your quota unused?

A user reported being auto-downgraded from a 20x plan despite having most of their quota unused. To continue working, they subscribed to a 5x plan for $100 on Sept 20, but their weekly quota immediately showed 0, with a reset not expected until around Sept 26. The user is seeking advice on whether others have experienced this, if support restored their plan or refunded unused portions, and the fastest way to contact OpenAI for assistance.

This report details a specific user's experience of an unexpected downgrade and subsequent quota issues after purchasing a new plan, unlike general complaints about service changes.