Still time to save it is a mute point. It's either dead or not dead. How long was it in the cold? As long as the soil in the pot didn't freeze solid it should if nothing else come back from the roots. There are different degrees of "freezing". If it was only in the cold a short while and just the foliage got froze then it will put out new foliage. If the foliage and upper part of trunks got froze they will turn black and fall off but the lower part of the trunks will put out new foliage. If everything above the soil got froze but the roots didn't then it will regrow from the roots. If everything got froze including the roots pitch it in the compost pile it's toast.
