Class action is the task to get justice for those concerned now.
See Once Voice Action Group as an example.
Grouping complaints is our challenge for changing the law to prevent similar things from happening in the future.
In the US, Americans for Fairness in Lending are organising The Fed Wants to Hear from You About Overdraft Loans. A former Lloyds bank manager says: if that is pertinent in the USA, it is at least double the problem here.