'You've reached your usage limit' error occurs no matter what I change

Any requests through the API gives the same 429 error. Even sending a single request with the API playground gives the ‘You’ve reached your usage limit.’ error. I have a paid account, and am not even close to the usage limit. I tried creating a second account with a new email, credit card and phone number and got the same error.

Anyone else completely locked out of the API?

I have a paid account and this is my notification: Too many requests in 1 hour. Try again later.

It is probably

I have never been locked out of API access except on rare occasions when I am testing and make to many requests, exceeded my rate limit.