Bonsai suffocated during shipping

Hello everybody! 
10 days ago I got a package containing my new bonsai tree that was apparently sitting in a box in a warehouse for at least 20 days.
All the leaves have fallen out but the tree is still alive (I checked). I am watering it correctly and I have placed it in front of a window with lots of light, and I think it is recovering, but I don’t know what else to do, should I prune it? What can I do to revive it?

send it back it is dead

It’s not dead little leafs are starting to grow, they sent me another one anyway but I don’t want to throw this one away. 

What species is it?
 

Carmona

Good luck.