...to ProZ.com Tech Support.
my ‘verified ID’ status suddenly changed to ‘not verified’ about two months ago.
Did you change your name and/or username?
I emailed support last week, but haven't received a reply yet.
who should I email about this?
Nobody, actually - e-mailing support won't work. Please submit a Support Request (go to the Support section of the site), or re-request your ID verification.
Best regards, Ralf