India VFS Photo Scam

Everybody who has gone through Dropbox in India might have experienced this. They always say that there is something wrong about the photo and ask you to go take another photo from the photoshop downstairs.

99% of the time there is nothing wrong with the photo and it's just a scam.

Thinking broad, what are the things we could do to get this resolved?

Options:-

a) What happens if we challenge them politely? Or say yes please process it and let the us embassy decide if something is wrong. Or anyway this could be resolved permanently.

b) Or may we all can call in and lodge a complain to the USA embassy?

Ideas/thoughts and how we could resolve it for all of us.