Rate Limit Exceeded on my first ever request | OpenAI | Page 1

Hi. I've been at it for a while, and i'm getting more and more confused.
I tried developping my first ever api on some C#. I created my first ever request:

string apiUrl = "https://api.openai.com/v1/completions";

        var client = new HttpClient();
        client.DefaultRequestHeaders.Add("Authorization", $"Bearer {apiKey}");

        var requestBody = new
        {
            model = "gpt-3.5-turbo",
            messages = new[]
            {
                new { role = "system", content = "You're the goat" },
                new { role = "user", content = "say that you're the goat" }
            }
        };

        var content = new StringContent(JsonConvert.SerializeObject(requestBody), Encoding.UTF8, "application/json");

        try
        {
            var response = await client.PostAsync(apiUrl, content);
            var responseString = await response.Content.ReadAsStringAsync();

            if (response.IsSuccessStatusCode)
            {
                Console.WriteLine("API : " + responseString);
            }
            else
            {
                Console.WriteLine($"Error {response.StatusCode}: {responseString}");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error : " + ex.Message);
        }

Just this, right in my Main function.
Too Many Requests, it would seem. I'm on free plan and on my usage it says i used 0 out of 5$ i have; and the response headers don't even have some "rate remaining" or something. Please can someone lend me a hand?

#Rate Limit Exceeded on my first ever request