urgent help needed (procedural fairness letter)

[Raqum]

Greetings to all.Please I need your advice regarding my case.I just got a procedural fairness letter saying my bank statement I provided is fraudulent.Actually this bank account was closed due to my credit card which was breached online.My bank request me to close my account and transfer the remaining funds to the new one and a new credit card was issued as well.But the bad thing I didn't do was to inform the visa office about the recent changes though my bank told me they will explain if any enquiry from the visa office.Please can any body suggest to me how to respond to this letter?and which documents or information should I provide.Please I am in urgent situation deadline is approaching for me to reply.Waiting for your kind respond