There appears to be no legal recourse other than suing the guys directly, due to such costs it would probably only happen through class action cases. I hope someone makes an example of these scammers soon, because it's really tiring to see honest people lose money - just because they can't spot that something just isn't currently practical or possible. Not everyone is an engineer, and not everyone knows where to research what technologies actually exist, and what don't...
For example, flexible lithium polymer type batteries do exist (my university, the University of Leeds has developed ones) but as far as I'm aware, the capacity is very limited - last I'd heard was on the order of 100mAh max. The problem is to make a larger capacity cell (of cell-phone like dimensions) you need to roll the layers in a manner not unlike making an electrolytic capacitor. Bending the battery then can violate the spacing between the layers, which can lead to short circuits and Bad Thingsā¢. It's possible to fix the form factor of a LiPo (Nike+ fuelband has curved LiPos) but only during manufacture. It can't be changed while in use.
Curved OLED panels do exist but only in very large sizes (55" for TVs, etc.) No manufacturer is selling flexible OLED panels of any form factor. Prototypes have been demonstrated at low densities. Many such displays suffer from repeated stress. The bonding on the chip-on-glass fails after many flexing operations, leading to stuck lines on the panel.