Follow the on-site instructions to temporarily lock your account and protect your funds. Call +1 (833) 835-1651 to contact Coinbase Support by phone. Listen to the options from the phone menu and select the option that applies to you. You’ll be connected to a live agent.
If you want to secure your Coinbase account or suspect unauthorized access, it's essential to take immediate action to protect your funds and personal information. Here are the general steps to lock your Coinbase account:

Log In to Your Coinbase Account:

Enter your email/username and password to log in.
Access Security Settings:

Once logged in, navigate to the "Settings" or "Security" section. This might be different depending on whether you're using the website or the app.
Enable Two-Factor Authentication (2FA):