Thanks everyone for responding.
Bhask, i will wait for two more days and call INS and will ask them to resend the notice.
If I have to re-file I-485, do I need to take medicals again ?
Do I need to wait again for one year for approval ? Please advise.
Meanwhile if you don't mind Bhask, can I contact you so that I will get an idea and i will prepare necessary documents without any further delay. I really appreciate your help in this matter.