I have upgraded my OpenAI account, but it keeps displaying errors!

The error I get (although my account was upgraded) :

{ “error”: { “message”: “You exceeded your current quota, please check your plan and billing details. For more information on this error, read the docs: https://platform.openai.com/docs/guides/error-codes/api-errors.”, “type”: “insufficient_quota”, “param”: null, “code”: “insufficient_quota” } }

Shouldn’t the change be immediate ?! it has been a couple of minutes…
And should I generate a new API key?