MILEX ROCKET BLENDER

i bought this Milex Rocket Blender from a GroupOn promotion. <br> <br> I used it a few times no problem, however i did notice that there was a plastic burning smell. <br> <br> I must have used it about 20 times total and then the mechanism on both blades (the part that pushes down and spins the blades) burnt off or broke off. <br> <br> I didnt do anything i shouldnt have. and only made items from the menu guide they provided. <br> <br> Is this product of such inferior quality that it just breaks like that?<br> <br> Is Groupon selling the factory faulted Milex Rocket Blender. <br> <br> I want it replaced.