So a google search of "coinbase contact us" brings up
support@coinbase.comBut when I try and send them an email i reiece the following message
Address not found
Your message wasn't delivered to
support@coinbase.com because the address couldn't be found, or is unable to receive mail.
I don't have an account on Coinbase, I don't know about their support email, but finding it with Google is bad. Google search engine is biased and manipulated, it's not strange if you search and find a phishing site on top.
In cryptocurrency, when you need to find something, try first with
Type the exchange name, and find their website, from which you can find more information like Contact us, suport.
With Coinbase, try it after login your account.
https://help.coinbase.com/en/contact-us