Maybe give it a bit longer. I don't want to cause any problems even though I am desperate to name them.
I think I've said this before somewhere but there's no way I'll condemn anyone on a public domain......its there for ever and why give it any chance of biting back. Revenge is often best tasted cold.....!
The builders (and neighbour) treated you very badly here but from what I can tell they didn't actually break the Law so common decency aside there's little to answer. The fact that they are no longer trading - at least under that name - means that anything can be denied as they would argue to the contrary anyway.
Only my opinion, for what its worth.
John