I recently helped a family member whose Uber account had been hacked. He couldn’t get Uber to do anything when he used the “contact us” link on their website. Fortunately, I was able to show him Elliott.org and its database of over 500 companies with links to names and addresses (real and email) of executives. This list is maintained by Christopher Elliott and his crew–he’s a well-known consumer advocate and journalist.
Long story made short–within 2 hours of sending an email to a Vice-President at Uber, my relative had everything straightened out.