case is not acceessible

I tried to call USCIS using 800 number. After I input my reciept number, it says not acessible and ask me call later.
Anyone had same experience? How can I reach a representative by phone?
Thanks advance!

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without receipt #, hard. But can use Infopass -pharmacyelite- 给 pharmacyelite 发送悄悄话 pharmacyelite 的博客首页 (71 bytes) () 08/22/2007 postreply 13:01:58

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