My account is still used by someone

Hello,
Last week, I have seen some strange historical prompting , I thought that my account was hacked! I disconnected all sessions, I changed my password to a new complex one and activated the MFA through my phone. I deleted all the history.
This morning I received an e-mail to reset my password that I ignored !
And now I see new prompts so if someone knows a method to contact chatgpt dev teams ? The stupid bot on the help website told me that I will be contacted since one week!!!

I will post in the social m├ędia if nothing happen !