Rotors where a great price, warped so bad in 9 mon...

Rotors where a great price, warped so bad in 9 months they are not usable.
Just called and was told basically "to bad" warranty doesn't cover warpage, only defects from the manufacture,
This is a important point, brake rotors and drums heat up during braking, they are defective if by applying heat and they can not stay true they the metal they are using sucks.
AutoZone will take their products back with this type of problem.
Looks like somethings might be better spent at a "box" store case in point.
I have bought many things through Rockauto, but I feel like I've just been screwed.
Didn't save any money on this one.