Lost your Google Account details so You will first have to correct password to login on Google and change the password, On the new Google log-in screen, click the Need help or so just make a call on Google Account Recovery number 1-888-587-9269 anytime and experts are there to help you 24*7 anytime.
http://www.allsupportno.com/google-account-recovery-page
Visit the Google Account Recovery page. ...
Select "I don't know my password". ...
Click "I don't know" or enter your last known password. ...
Choose your recovery option. ...
Enter your verification information. ...
Create a new password.