Have you ever used a third party app I mean a modified version like this https://gbapps.net/fmwhatsapp-apk-download/ to use WhatsApp with more features and functions from the same number if you have done so your WhatsApp account is permanently banned This is because using two WhatsApp with the same number is against WhatsApp's policies so your account is not being opened. You will have to contact WhatsApp then your account may be opened.
