go here and report it
https://services.google.com/inquiry/gmail_security1
The Gmail Team considers numerous data points when determining
original account ownership in a hijacking case. In addition to the
information requested on the form (
https://services.google.com/inquiry/
gmail_security1), you can also include the following information to
help gmail process your claim:
- The email addresses of up to 5 Frequently Mailed Contacts*
- The names of up to 4 Labels*
- Any other Google services you used with this account and the date
you started using each one
also provide your ip address from this site
http://www.whatismyip.com/
*Google takes the privacy and security of your email information
seriously. Verifying the Contacts and Labels in your Gmail account is
done via an automated process. As such, the verification process does
not require a content review of your email messages. Please see
Google's Privacy Policy for more information on Google's commitment
to privacy.
Lastly, you are able to submit the form more than once should you
discover additional information that would help Gmail investigation.