You're receiving emails from Heroku even though you're never heard of Heroku or signed up for this service before.
If you've never signed up for Heroku and are receiving email notifications from us, it's likely that your email has been hacked and was used to create an account on Heroku. In this case, we highly recommend that you change your email password immediately.
Afterwards, please email email@example.com from the email that's receiving the Heroku notifications.
Usually these accounts rely on stolen credit cards owned by someone else. However, if you're seeing charges from Heroku on your credit card, please reach out to your credit card company immediately.