Stealing Competitors Fans

On one of my fan pages I think a competitor is taking my fans. We sell the same stuff and their are not many fan pages that sell this. Some of my fans message me and tell me blah blah blah fan page is selling the same and he/she told me about it. My fan said I would of bought it off you.

How the hell is this piece of shit taking my fans?? I have many fan pages in different niches but this piece of shit is sending my fan emails I think with this niche. I can't target his fan page or vice versa because it's not in the interest for ads. What do you think?

Not a lot of info there, but from what you posted it sounds like somebody is simply providing a better service. What's the element that's causing your fans to go to him? Lower prices? Better quality service? You have to figure out what your competitor is using to attract those people and out-do him at it.

they are not stealing they are following perfect marketing strategy. and if you loose your fans it means you failed to provide better service.