WhatsApp Suddenly Banned My USA Number Without Explanation

I have been unable to use my WhatsApp account linked to my USA number +1 (331) 231 33*** since it was suddenly banned around January. I am using an iPhone with iOS 15, and I did not receive any explanation by email or message about the reason for this ban, other than the in‑app notice. After the ban, I contacted WhatsApp support, but I am still facing the same problem. When I try to log in again, I repeatedly receive the warning that this number is not valid, and I cannot complete the login process. I kindly request that my account and number be reviewed and that the ban be lifted so that I can use my WhatsApp account again without errors, or that I receive a clear explanation if there is any specific issue that needs to be resolved on my side. I also request that this issue be reviewed and resolved as soon as possible, as I need this number for my daily communication.