wait for USC？Please help!

我2008年1月15号交的第二轮。
3月27号在上海面试的，面试官说result should be out in 2 weeks.
4月9号收到email说
we have yet to receive your undergraduate transcripts. If you like, you can e-mail or fax your unofficial transcripts to our office at the fax number below. We will use them to complete your review and render a decision.
当天给她email了，
4月12号说还要中文版的成绩单，当天给她email了。4月15号收到email I will forward your application for final review.
等了很久没有回音，于是4月22号给招办主任发了email。 4月23号收到email说We are processing your application and will have your decision available at the end of this week.
4月28号收到招办主任email：I am not in my office at this time, but I know that you have already been accepted into our MBA program. You should be receiving an admit package in the mail very soon.
４月29号收到面试官的email：We would like to offer you admission, however, at this time we cannot because of an issue with your transcript. We still do not have your official transcripts, and we must have official transcripts from your undergraduate university before we can offer admission.
4月30号给寄了份DHL
等了一个礼拜没回音， 5月7号给面试官打了电话发了email，当天得到回复： It will take at least 2 weeks for the University to process your
transcript, if it is an official transcript and acceptable.
比较着急了于是问了奖学金的情况， 5月13日招办主任回meail： You have not officially been admitted into the MBA Program. You still need to provide an official transcript to USC. However, your application has been tagged for fellowship consideration. A one-half tuition scholarship for both years is the expected offer to follow upon acceptance.
5月23号发了邮件给面试官询问成绩单的情况，无回音。

目前交了另外一所学校的押金，正在办I-20，约了6月26号的签证面试。但是非常舍不得USC。 USC是8月4号开学，那我必须7月中旬就到LA找房子。现在上海签证预约已经到7月份了。请问我该怎么办？