There is no any email or lie chat in the interface, the bottom right corner widget doesn’t offer any contact details or solutions?
Everywhere in my code the indicated model is gpt-4o-mini but I was charged on 33% of my account balance for using GPT-4 model
You’d press “help” in the API platform account web page.
You would select “messages” in the pop-up help widget, click through the choices and avoid its suggestions that you read more, until you can report an API problem and actually type a message. It is a phone tree in bot form.
You will have to be absolutely sure that you don’t have any other use, like in the playground which is also billed to you, to make your case, and also that your API keys have remained secure.