check联系国会代表的问题： 写哪个federal agency

被check 了超过三个月， 联系了国会代表，他叫我描述issue dealing with fedral agency， 和自己想要的解决方法。

那我是写哪个fedral agency 呢？ 大使馆还是DOS？
还有写解决方法。。。是写给我clearance 吗。。。是不是太直接了。。

谢谢在先！！

"We recently received your message seeking my office's assistance with a federal agency. Before we can contact the federal agency on your behalf, we need a signed Privacy Authorization Form from you.
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In order for your form to be considered valid, the form must include an ink signature; digital signatures will not be accepted. Most importantly, please include on the form a detailed description of your issue as well as the resolution you would like to achieve. A description of your issue must be included on the attached form, this allows my office as well as the federal agency to be able to address your concern in a more timely and effective manner. Furthermore, if there are any relevant documents or letters supporting your claim please feel free to include a copy with your returned form.
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补充内容 (2019-8-27 08:41):
找代表我在下面找我学校区里的代表，senator我没去找，牌太大，估计没用。。。
www[DOT]govtrack[DOT]us/congress/members

应该是dos吧 顺便问下lz是如何联系到国会代表的呀？