help with the english helpline

I am writing to raise a serious concern about the English Helpline’s handling of my case. Despite regularly contacting the service and diligently following instructions (often resending the same documents), no progress has been made and I have never received a message in my Ameli account.
On my most recent call, I followed the exact instructions given previously: to call back after one week if I had not received a message. After waiting more than a week without any update, I called back and, after a long hold, was told I was “not listening to instructions” and that the helpline would “no longer accept my calls.” When I asked which instructions I had failed to follow, none were specified. My request to speak with a supervisor was refused, and the call was disconnected. When I called again, I was informed the supervisor had declined to take my call. My further request to receive this decision in writing, so that I could appeal, was also ignored and the call cut off.
I emphasize that I have always remained polite and respectful, and have only followed the instructions given. As these calls are recorded, I respectfully request that a supervisor outside the service review them, and clarify under what legal authority a government helpline can refuse service to a citizen.
As a newcomer to France, I rely on this service to navigate the healthcare system, and I urgently request your assistance in restoring my right to access.