Mu uncle and aunty living on the upper floor of our bungalow the main issue is they are continuously

Mu uncle and aunty living on the upper floor of our bungalow the main issue is they are continuously harass us, there gutter is broken and all the dirty water spilled on the ground floor and we are facing the problem, Second he Also doesn't obey the mutual consensus rules which we had done in the court he didn't make separate gate for his family. He is still using our gate and come here at our side to threaten us. He also using the techniques to hurt our properties so can you please tell me what should I do to teach him a lesson because he is also not obey the court proceed so, please explain me the steps where to complain whom to complain and what if police don't listen to us . Because it's very serious Matter . We have already case against him in the court but he is criminal minded so, please guide me to take steps.