Cognizant — Didn't receive any further mail or call after salary negotiation

I completed my interview on 7th july and got a call for salary negotiation on 12th july. After that I haven't received any sort of mail or call about further procedure.
I didn't have my HR mail ID but I have his number but he is not responding.
Can any one help me because I want to know whether the offer is still on plate or not. Thank you.