No Reply For Resignation From Company

I have send an email about my resignation to the HR. but there is no reply from HR side. I have mentioned my last working date is 2-dec-2013. When i joing itself i didn't get any documents like offer letter, appointment order. There are saying 60 days is the notice period. i have mentioned last working date as 15 days from the email sent. if the didn't reply for the resignation then what can i do?? please help me to come out.

Employment terms are governed as per the employment contract. As you have not received you may leave as per your wish and its better that you have informed the prior leaving the job.
So discuss with them and make all things clear always maintain good relationship with your previous employer.