If you think your Google Account or Gmail have been hacked, follow the steps below to help spot suspicious activity, get back into your account, and make it more secure.
Step 1: Sign in to your Google Account
You’re signed in to your signed account. If you want to secure this account, skip to step 2. To secure a different account, sign in.
If you can’t sign in
Go to the account recovery page, and answer the questions as best you can. These tips can help.
Use the account recovery page if:
•Someone changed your account info, like your •password or recovery phone number.
•Someone deleted your account.
•You can’t sign in for another reason.
Tip: To make sure you’re trying to sign in to the right account, try recovering your username.
Step 2: Review activity & help secure your hacked Google Account
•Review your account activity
•Review which devices use your account
Step 3: Take more security steps
•Turn on 2-Step Verification
•Contact your bank or local authorities
•Remove harmful software
•Install a more secure browser
•Help prevent password theft with Password Alert
•Help secure your apps and devices
•Help secure other Google products you use
I hope this information will be a great help.