Use Google Feedback.
Go to gmail.com
Click on the gear button then click Send feedback
Fill up the form and submit it.
Also post a question on the official Gmail forum -> https://support.google.com/mail/community
First thing, you should not share your Facebook password with anyone else. It's a violation of Facebook’s Statement of Rights and Responsibilities to share or solicit a Facebook password.
not share your password, give access to your Facebook account to others or transfer your account to anyone else (without our permission).
So, if you are sharing it with ...