You can now request help from the Help page in your Play Console account. If you don't have access to Play Console, ask your account admin for an invite.
Contacter Google Play à propos de la résiliation d'un compte, ou de la suppression ou la suspension d'une application
Has your developer account been terminated?
What is the cited REASON FOR TERMINATION in the email sent to your registered developer email address?
Do you want to appeal the removal of individual apps in your catalog or termination of your developer account?
Do you believe your app was rejected, removed, or suspended in error?