Also to understand the situation a bit more; I believe the print agency contacting you is the advertising agency who won the contract from the bank in its advertising/marketing campaign. It could also be a smaller sub contractor of a bigger film (who won the contract bid). Normally the bank puts out a tender or a request for quote from its pool of vendors and the creative directors and sales person from these respective agencies will come to the bank marketing dept to pitch their concept and plan, and quote their prices. The bank then choose. The figures can be in the thousands, tens of thousands, or hundreds of thousands of dollars (equivalent to Sing) depending upon the size and scale. The image idea their stole from you could be only a very small part of that whole project, or it could make up to be major part, you know don't. What we know is that getting your email to the right dept or person in the bank, could have a huge impact on their impression of the creative agency they hired, and if it affects their branding and corporate image enough, they will want to solve the problem.
Your problem is getting the right people's attention.
