I need help with my account, it got gpt4-api but was detected

Dear OpenAI, hello, I am a university student from China, and I really like OpenAI and ChatGPT. I started using ChatGPT in February this year to assist me in my studies and work. However, today I encountered some trouble. My account is WendySamantha74@outlook.com. In early April, the account was banned, but I don’t know what happened or what I did that led to the ban. Even though I had just renewed my Plus subscription, I tried to send an appeal email to your company, but it didn’t seem to have any effect. Today, I received an email stating, “Your organization has passed the GPT-4 API application.” But I soon realized that the banned account could not use the GPT-4 API. I would like to unban my account, as it is very important to me. Can you help me?

I tried sending an email to support@openai.com, but I did not get any response. I sent the email around April 6th, asking for help.
Note: I used a translation.