Dealing with Chavs - Deterrents/Punishments needed.

After several years of repeated harrassment from chavs including three physical assaults that the police have refused to properly investigate to imprison the perpetrators, I am at my wits end in finding a solution. How do we get police to properly treat the crimes the chavs commit against disabled people as actual crimes worth investigations that see through to the end and imprison or otherwise punish chavs to create a effective deterrent to further crimes?

Sadly it seems that after Owen Jones published his ablest scrawl "Chavs", no one dares to make chavs account for their crimes.

(For those not in the know: Chavs are uncouth, low-class-acting people, the worse of which are responsible for the deaths and murders of Fiona Pilkington, Sophie Lancaster, Christine Lakinski, Gemma Hayter, Steven Simpson and many, many other disabled/minority people. They usually hang around in large gangs, on the look out for opportunistic crimes to commit, wearing tracksuits no matter the weather or what activity they're doing. They are often drunk and use illegal drugs.)