Missing Chances, Please Help!

<p>I am an international student and I sent my application package (including the Common App) by mail to the admission office on March 2nd .
I waited until March 17th then I emailed them to ask for application confirmation because I have not received one.
However, they told me they have not received mine and told me to log in the Common App website to send. The problem is I did send the Common App by mail, not by the website.
Then I asked the delivery service and she told me that my package was received on March 6th and gave me the name of the receiver.
Now I email the admission office with more information on the package (the day and time March 6th, the name of the receiver and something I wrote outside the package) but still haven't got any replies whether they did get my package (I've been waiting for 3 days and the deadline is over.)
I feel very desperate because I haven't got a chance to be reviewed.
What should I do? Should I just give up hope and apply to other schools?
Any help appreciated!</p>

<p>Anyone Please?</p>