Not received RFE (hardcopy) its more than 15 days

I have received RFE on early 1st week of oct ,but yet not received the hard copy to see actually what are they requesting .Can anyone tell what should i do know , how should we can contact them .

USCIS website updated RFE on Sept 26, still waiting for details, filed at Californina

Your employer/attorney should receive the RFE notice within 30 days. It would have all the details.