Yep, law is law, it might sometimes seem strange and not necessarily fair, but that's the way it is. If a Bank (or any other concern) goes against the law, then tough.
I don't agree with certain laws which prohibit/limit me from doing certain things, but it's the law. If I do it and get caught, I'll accept the punishment.
I seem to recall there was something like a "Winding-up order" which you could serve against a company which didn't honour its debts to you (after going through various stages). Basically says pay me or you're out of business. That would be a good one to try against a Bank worth trillions.