If my green finches leg is broken what can i do?

my green finch has trapped its leg today in my avery i wasn't in at the time my mum had to get it out she said that it bled a lot and my uncle come and he said it looks bad but threes no vets open now i have put it into a transporting cage with food and water it can fly but not good on it legs so what should i do until a vet opens it got stuck with the ring on its leg it has settled down now in its cage but i need to do something about it asap