H1B RFE status

My H1B still in RFE status since 28th December 2016 at vermont center. Can anyone please tell me what is the maximum time for RFE and what can i do to contact USCIS? Its been frustating now to wait for so long time.

Even my case was in Rfe in Vermont service centre…Got notified as approved only on yesterday…All t best for you …

Thanks…how much time u had the RFE status with USCIS?