Wishful thinking here mate...
They need to provide a courtesy car until they decide that the car is a write-off.. or until you get your car back repaired.
Unfortunately, you'll be car-less until you get your money from them.. which could take a while as Insurance Companies are coonts.
I'd say that the best thing to do is to be a pain in the arse with them, call every other day, asking whats happening and when you're getting your pay out as you need to buy a replacement car ASAP etc.
Good luck bud.
Cheers,
Grant