How to contact Google G Suite without having an account?

I obtained a mail from gsuite-noreply@google.com about inactive classic sites. I do not know about which site they are talking.

On their support page, one needs to connect using a G Suite account in order to contact them, but I think I do not have such an account.

Does somebody if they can be contacted without G Suite account?

[Tell me if this question is inappropriate.]

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Author: Karlo