It's so ironical that we can complain about the noise of our neighbours while we can't hear the noise we can make which can be more louder and annoying. I am saying this because of your tone-deaf neighbour's behaviour. If your aim is not to move, then try to tell them in a suitable way about the noise they made and you had tolerated, and tell them definitely that if they want you to move, then at least they must help you from the transporting of the piano to a place where you can live.
I am not a coward, but try not to get in a very serious confrontation because the only thing one gets is being more annoyed, frustrated and angrier than before without resolving anything.
Could you be more specific with your piano's size, type (vertical or grand), and location?, this comes because one wants to know the difficulties of moving your piano. In fact, I suppose that because is a piano, you will need help to transport it.
If all of you come to a deal, then instead of being rude and aggressive and complaining of the "noise" you made and evict you, at least they must suggest some options and help you with finding and moving the piano to a more suitable place, either in the building or at another place.