You’ll need to reinstall Authenticator on your phone. Alternatively, you may use a web-based tool like Authy. Other options do exist. All of your accounts must be recreated. This is only feasible if account recovery is successful.
Select the Forgot User ID / Password option in the window’s center. On the following screen, choose a password. Enter your official User ID. Fill in your registered Date of Birth on this page. Provide the Captcha code to verify your identity. Select Submit from the drop-down menu that appears once you’ve completed all of these steps.
Go to Google Account Recovery. Enter your email address. Select “Try another way to sign in” option. Click on “Try another way” once more. nWait for 48 hours before continuing.