My sympathies. Nothing more frustrating than having laws and rules and zero enforcement.
Not a lawyer, but the building management is clearly evading their principal function of their contract to enforce the laws of the building. That this should go on in a 'no pets' building is absurd. Starting a lawsuit against building management might wake them up and get them off their ass.
As Rani said, publish the building AND I would include the incompetent and ineffectual management company so we can avoid any of their buildings.