Well if you have the proof of some of the agency /person you can file a police complaint or approach a lawyer to file a suit against the people who have misused your snaps and also ask for compensation:) for the mental trauma you had to undergo ..
Just find some good criminal lawyer and you can make some money out of this

..
But on the serious side please do go ahead and file a written complaint in the station or file a suit in the court ..
You can restrain him from using your pics
you can ask for compensation for using your pics without your approval
and depending on the misuse you can actually put the guy behind bar or make him pay a huge fine