Well, a lot of times love spells shouldn't work. You can't control someone's free will, if that's what you're trying to do. If you're trying to attract love, there are tons of little charms and such that will help bring it into your life. You just can't make someone love you.
Even if you could, would you really want them to only love you because of some spell? You wouldn't ever know if they really had feelings for you, or if it was just your spell. I don't know about you, but that would bother me a lot.
For future reference, a lot of times when someone charges a lot of money to cast a spell for you then they're just trying to make money. They usually don't actually do anything, besides suck your money. I would watch out for scams like that, it happens all the time.
Love, light, and blessings. )O(