I tried to reset the password from the gitlab.gnome.org password reset page, but never got an e-mail with the reset link, when I try to create a new account system tell me that an account with this email already exists. I’m sure the e-mail is right (it’s the same as this discourse account).
according to your link in order to contact infrastructure team for issue that are not urgent or security, you should access to gitlab.gnome.org. It’s quite annoying. I’ll give a try to IRC channel.