Purchased OpenAI credits expire after one year

I purchased around $10 of OpenAI API credits with my credit card on September 26 2023. End of September 2024, I suddenly get HTTP 429 errors. I check the dashboard and it says I have -0.01$ in credits. I’m sure I didn’t use more than a few cents in the past year.

Where did my credits go? They must have expired, but I can't find a reference to that. I can’t even look at year-level usage to quickly check that I didn’t use $10 (I clicked through 12 months and yes, I used less than $1).

It’s not great that OpenAI sets an expiration on credits without clearly informing users.