Looking at what we have learned with our "problem":
1 You need a group of many people who are affected. Customers, neighbours, other businesses, The more you look the more you will find.
2 You have to collect and collate all the evidence and find as many breaches as you can. You don't know which one will stick.
3 You need to identify a small number of officials that have to act - Trading Standards, Local Police, Local Authority. You need names not vague titles.
4 Your objective is to transfer the worry and loss of sleep from the victims to the officials who are not acting. Once they wake up each morning thinking about this business you are getting somewhere.
5 Once you have drawn the careers and health of the relevant officials into the problem you have push for the destruction / removal of the whole lot, and arrest of those involved, not small changes. Its got to go and stay gone.
In our case the initial official line was "its just a problem family" whereas out position was "its an organised and significant criminal enterprise". We gathered evidence of the scale of the criminality and kept on writing to the Police and Council about their failure to deal with organised crime. A major step forward was when the Police yet again sent a junior PCSO and she was assaulted. That helped prove our interpretation of events. I wrote to the Chief Constable and set him a challenge, "these people believe they are above the law and so far you are confirming that, prove me wrong".