WhatsApp Account Banned Even After Installing the Official App

I have been unable to use my WhatsApp account for about two months on my Redmi Note 8. When I try to open WhatsApp, I see a message stating that my access has been blocked because of using an unofficial WhatsApp application and that I should install the official app. After this message appeared, I removed the unofficial version and several times installed the official WhatsApp application from the Play Store, but my number still remains banned and I cannot access my account. I do not have access to my chats or contacts and I cannot use WhatsApp for my daily communication. I kindly request that my WhatsApp account and phone number be unbanned and reactivated so that I can continue using the service through the official application.