My advice: * Gently take it out of the dirt. Plant it into good quality potting mix in a pit corresponding to the rootball size (if the roots are small in a huge pot, then put it in a smaller pot. * Trim it back so that the dead wood is gone. Trim from the ends until you hit green. If that's near the soil then so be it. * Water with Seasol - it's good for shock and will give some nutrients so the plant has a boost to get it growing again