I'm using gemini API keys, it keeps hitting free tier limits, hence I created new api keys, created a billing account, linked the project (with new api keys) to the billing account. Now on aistudio it shows I'm on tier1 (before it was free tier) and in billing page it shows I'm on Paid account, yet it keeps hitting same usage limits and in error message it says that I'm still in free tier?
Why is it soo difficult to configure basic payment on gemini api? What am I missing here?