PNB — Shared transaction history with some third party

I am having my account in PNB(Branch-Yamuna Vihar), my account transaction history for almost last 3 years has been disclosed by the bank to some third party and that information is being present in Karkardooma court by the third party without my consent.That person is threatening us to kidnap my younger brother who is just 15 years old, he is also threatening use to vacate out PNB account .How a govt bank can give this legitimate information to any random person without the permission of the a/c holder.
Please help me with this and take the necessary action on the bank.
I have attached the copy that has been submitted in the court by the third party whose name is Vikrant jain([protected])