FCC complaints are usually more effective, never dealt with one in the current shitty administration, but legally the FCC requires resolution within 7 business days, or at least a plan of action if resolution isn't possible for completion.
I used to receive the emails and all the people on an FCC chain put pressure on the lower levels.
I'll file a complaint with the FCC as well then. I'll probably file one with the City of Chicago too. Might as well put as much pressure as I can on them, because this is ridiculous.
I don't care if the issue is bureaucracy, incompetence, or greed, but I know filing lots of complaints with regulatory bodies generally solves the first and the third issue well, and motivates companies to fix the second issue too.
I'll second the FCC complaint route. A friend has a HD tv with a cable-card.
Getting support after a while wasn't working (to be polite he was getting the runaround), but the FCC complaint got their attention and got the issue resolved. This was with the previous administration, which was was more sympathetic, but still worth a try.
I can confirm that Comcast responds to FCC complaints effectively. I used that route when they were my provider after a series of unhelpful technical support requests.