I agree that it is annoying - but it's something that you have to learn to live with.
The only real course of action is the legal one but it is expensive, time consuming and, even if you win, you are never any better off.
I've had it happen to me on quite a few occasions and these days I just laugh.
The last time was typical. A Government initiative was run a year or two back promoting something or other. Every school, college and library in the UK was sent postcards to give away. The picture on the postcard was one of mine - lifted from a book cover I had done about 6 years previous. So I 'phoned them up.
'You've used one of my photos without my permission. That's a breach of copyright.'
'Can you prove it is one of yours?'
'Certainly. And there are witnesses - the man who posed for the picture for one.'
'Oh. Well I'm very sorry. We make every effort to find the copyright owner and get their consent but obviously in this case it wasn't possible'.
'You must have got the image from the book cover - there is no other way. I am credited on the cover and the publishers have my contact details. You couldn't have tried very hard.'
'I'm not prepared to continue this conversation. You will have to talk to our legal department'.
The result was a letter saying either sue or go away. In the end I decided it wasn't worth it. If I went to court and won I would be lucky to get my costs back. I still have one of the postcards pinned up on my wall to remind me that the world is full of b*stards who don't give a d*mn about you or your rights.