Answer:
If your rights have been violated by the police, you should contact the Independent Police Investigative Directorate.
Explanation:
The mission of the Independent Police Investigative Directorate (IPID) is to be an effective, independent and impartial investigating and oversight body that is committed to justice and acting in the public interest, while maintaining the highest standards of integrity and excellence.
 
        
             
        
        
        
Chamber pretty much means an enclosed room or space especially one in a legislative building, or a group that meets for a particular purpose or within a particular space. 
Hope this helps!