Incorrect name in document request letter and "La copie de l’apostille."

I have applied for social security (health insurance) and recently received a letter from Ameli requesting additional documents. However, I noticed that my name is incorrect on the document I received. Could you please advise me on how to have my name corrected in your records?
Additionally, I had already submitted my birth certificate issued by the municipal corporation in my home country, but I am being asked again to provide a birth certificate. I would appreciate it if you could clarify whether the previously submitted document is insufficient, or if a different format or version is required. Lastly, I have been asked to submit “la copie de l’apostille.” Could you please confirm whether this refers to the apostille attached to my birth certificate, and if a simple copy is sufficient?
Thank you very much for your assistance.