A lot of the Letting Agencies are now renting individual rooms within shared houses (usually other Freshers) so you don't have to have a ready-made group of other students. I went in person today and asked what was available but if you look online you will find houses where this is possible or just ring up and ask.
I wouldn't wait for the university to get back to you with other students' contact details given how inefficient it's been so far...
Good luck to everyone- it's been an horrendous experience.