How to enquire about 221g status


I attended visa interview for H1b at Chennai consulate during November 2016. They have issued 221g blue slip asking my employer to provide more supporting documents like project plan, tax statements, employees details. The required documents are sent by employer in january and got the automated response confirming receipt of documents.

But till now there is no update on it. I have been sending mails to support email but i keep on getting same reply that my case is in administrative processing and it cannot be expedited. Is there a way for me to get actual information. Is there any validity issue for the visa application since its reaching one year.