网上看到移民局给我寄了封信出来，但二十多天了还没有收到怎么办》？

网上看到移民局给我寄了封信出来，但二十多天了还没有收到怎么办》？
On August 10, 2007, we mailed a notice requesting additional evidence and/or information in this case. Please follow the instructions on the notice to submit the evidence and/or information requested. This case will be held in suspense until we either receive the evidence or the opportunity to submit it expires. Once you submit the information and/or evidence requested, you will be notified by mail when a decision is made, or if the office needs something further from you. If you move while this case is pending, call customer service

真郁闷呀，~！