Google can help you recover access to your account by asking a series of security questions to verify your identity. Important: To recover an account for a child under 13 years: Learn how to reset your child's password. To recover a work, school, or group account: For help, contact your administrator.

If you use Gmail, check the inbox of the recovery email address you provided when you signed up for Gmail. If you didn't provide a recovery email address, you can try another way to recover your account. You'll be asked some questions to confirm it's your account. Answer as best you can.

The error message "this phone number cannot be used for verification" indicates that the phone number you're trying to use has been used too many times to verify Google accounts. This is a security measure to prevent abuse of Google's verification system.