I'm not sure what kind of diet you have tried, but here's a few more recommendation for you. Hope that helps.
http://burnfatseasy.com -> Selling fat burning supplement, it's Garcinia Cambogia extract, currently having promotion just $9.95 a bottle and able to get 2nd bottle for free if you subscribe email
http://detoxfatloss.com -> Detox approach such as liver detox in order to restore liver function and burn fats naturally
http://metabollicbooster.com -> Specially designed for women, if you are woman, you can take a look.
Wish you good luck.