can anyone help me? I upgraded my chat gpt to chatgpt plus, I have paid until the payment status is complete, but until now my status is still free, what is the solution?
Welcome 
to the community!
Did you try log out from all your devices.
First try to log out one by one all devices, then from your main ChatGPT on the browser:
Settings → Security → log out all
Logging out from all devices process may take 30 minutes behind the scene.
Then clean your browser’s cache, history, cookies, and log in.
If it does not work, go to https://help.openai.com/en/ and contact with OpenAI support team.