Hi,
ChatGPT is operated by OpenAI Inc., AIPRM is operated by AIPRM, Corp. Kindly continue to reach out OpenAI https://help.openai.com/en/.
But, if you are referring to your AIPRM subscription, make sure your ChatGPT OpenAI account is connected to the correct AIPRM account and displays the correct AIPRM Account Level. You can check this by clicking on the “Your AIPRM Account” link in ChatGPT. Steps are here - How to Link Your OpenAI to AIPRM account
Alternatively, you can contact us at hello@aiprm.com by using the email you connected or purchased with AIPRM, so that we can guide you further.
About the invoice, if you meant AIPRM invoice, follow the steps here -