Are you sure ETS won't do anything? There seems to be a pretty clear-cut case that an equipment malfunction caused you to be disadvantaged. Not that I've ever had to deal with their administrators, but surely there's a good chance they'll give you a free retest or something. You should definitely keep bugging them and see how they respond.
Unfortunately, the length of time until the next available test is a bit of an issue. I would email UCSC and UCSB, explain the situation, and ask what they'd like you to do. They might ask you to submit the current scores for the moment, and then submit the new ones once you're able to retest. (However, do UCSC and UCSB already have the scores from your first try? I suppose there's a risk that they'll just decide to rely on those scores, since you took that test unimpeded.)
Basically, just keep communicating, and hopefully something can be worked out. Don't give up!