Community admin - giving free game - Steam users

Not sure if this is a scam or worse but somebody claiming to be steam admin offering u a free game just contacted me on steam. I told him I am not interested and he went offline. I am trying to find a way to contact steam to verify his ID and his insistance that he can give u a copy of any game u want on your steam account. Be aware of this group this seems real strange and not a genuine steam admin.

Anybody know how to contact steam direct. I have support account but not sure how to send in a ticket to the admin staff.

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