EAD申请状态询问

大神们，我的OPT申请状态一直是Notice Was Returned To USCIS Because The Post Office Could Not Deliver It. 并且还说[align="center"]This could have a serious effect on your case[/align]
[align="center"]持续了三个月了，请问有小伙伴经历过这个么？我打电话给USCIS他们说是在pending，但是我这也根本查不到status啊，至少给我个[/align]
[align="center"]case was received也好。[/align][align="center"]我查了一下那些case was received的状态上面有说Please follow the instructions in the notice 请问这是什么instructions啊？[/align]
[align="center"]请问我现在该怎么做？打电话很多次了，也加急过了，一直都是这个状态... 愁死了...[/align]
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