I would not try to revive this myself. Even IF there still is life (The green under the bark means.. it is green. It requires a bit of experience to judge whether it is live, or just residual green). The way the plant looks, with shriveled branches makes me suspect it to be dead.
In some cases plants come back from looking like this. But on to of it, you removed all the soil from the roots. I do not expect this plant to come back. sorry.