Sign-in problems with your Gmail account:

If you are unable to access your account or believe your account has been compromised by another person or malware or for any other issue regarding your access to your email (Gmail), please click on the link below and follow the instructions below from Google.

https://support.google.com/mail/troubleshooter/2943007?hl=en&ref_topic=3394386

The Google Help Center:

For any other information or problems regarding the services provided by Google you may follow the link below:

https://support.google.com

Please note that the above applies to all Google products such as: YouTube, Google+, Google Play, Google Drive, etc.

Google is reported to be based in the US and is therefore subject to local foreign law.