What do you do when law and justice become so disconnected that law enforcement actively ignores horrible things happening in your local community (e.g. the Pak

What do you do when law and justice become so disconnected that law enforcement actively ignores horrible things happening in your local community (e.g. the Pakistani rape/prostitution gangs in England, with Rotherham as central figure)? Do you just "vote better" and wait a few years for nothing to happen? Vigilantism is always a symptom of far greater problems, people don't do it just for fun and to cosplay as Batman.