Net? What net?

Our Internet connection died on Sunday.
Kaput. No reason. I just walked in and Mum started going 'There's a problem with Mozilla... I can't get online...' Tried my computer and it wouldn't connect either. Plugged the old modem back in, still no luck.
We've been yelling at the virgin.net people down the phone in a vague attempt to get the thing moving again. They think it's the BT people's fault - something going wrong at the phone exchange. As long as *one* of them fixes it, I'm okay... sort of...
So I'm waiting, sans home internet connection. I'm using one of the art college's computers to post this. They're the only ones in the college that have Mozilla on them. All the other PCs have Internet Explorer and I'm too much of a browser snob to use it, and for some reason the Macs seem to be keeping me logged in to my email when I don't want them to... I daren't log into LJ on one of them in case the same thing happens. I can clear the cookies, but shouldn't have to...