[Billing sync bug] Prepay balance shows R$0 / 429 RESOURCE_EXHAUSTED despite funded prepaid balance

Summary
-------
My Gemini API requests fail with HTTP 429 "Your prepayment credits are depleted",
but I funded my prepay balance 5 days ago and consumption reports show I used only
a fraction of it. This matches the prepay balance sync bug several other users have
reported in this same period.

Details
-------
- Project ID: gen-lang-client-06956250..
- Region/Currency: Brazil (BRL, R$)
- API: Gemini Developer API (key created recently)
- Model in use: gemini-2.5-flash

The mismatch
------------
- Prepaid top-up: R$40.00, added ~5 days ago.
- Reported consumption (every usage chart/report): R$13.48.
- Expected remaining balance: R$40.00 - R$13.48 = R$26.52.
- AI Studio > Dashboard > Usage and Limits shows prepay balance = R$0.00.
- The depletion is therefore false: R$26.52 should still be available.

Error returned (confirmed 2026-06-09 14:06 UTC)
-----------------------------------------------
POST https://generativelanguage.googleapis.com/v1beta/openai/chat/completions
{
  "error": {
    "code": 429,
    "message": "Your prepayment credits are depleted. Please go to AI Studio
                at https://ai.studio/projects to manage your project and billing.",
    "status": "RESOURCE_EXHAUSTED"
  }
}

Request
-------
Please review and resync my prepay balance so it reflects the actual funded amount
minus reported consumption (R$26.52 remaining). The false depletion is blocking a
production integration.