The idea here is to capture attention (short, punchy letter), provide all the ammunition a staffer needs to make a phone call asking what the hell is going on (the attachments), and the targeting information.
Send 'em hard copy, to both the DC and the local district office. Wait two days, send an email. Wait a day and call, asking to speak with someone in reference to same. You won't get the Congressman, of course, but if you get a competent staffer they'll know how to look into the matter and make people uncomfortable enough to do better. Get someone who's worked in the district a few years and they probably play tennis with someone at the University.
These offices are heavily dedicated to constituent service. If you get their attention and make it easy for them to investigate, some staffer will pick this as a lay-up "good deed for the day."
Congress doesn't have jurisdiction, of course, but any public institution steps to when the office calls. They'll pay attention, and they may very well look harder for some discretion to fix this.
The overall system is, of course, stupid. That won't get any better, it's a set of compromises among reasonable sounding concerns that have amounted to a Kafka-esque impossibility. But there is a lot of discretion in the joints -- if you can make someone notice this particular glitch, it might get fixed.