Firstly, read "How to Win Friends and Influence People". There's a good chapter on letter-writing.
Secondly: write a polite and short letter addressed directly to the Chairperson of the financial institution. They don't want the hassle and/or exposure, especially if you have a strong case. (This has worked for me personally and a number of others whom I know.)
Thirdly, the financial regulator might be worth a shot if the Chairperson letter doesn't work.
Secondly: write a polite and short letter addressed directly to the Chairperson of the financial institution. They don't want the hassle and/or exposure, especially if you have a strong case. (This has worked for me personally and a number of others whom I know.)
Thirdly, the financial regulator might be worth a shot if the Chairperson letter doesn't work.