Defective break parts on not 1 not 2 but 3 of the ...

Defective break parts on not 1 not 2 but 3 of the caliper's I purchased with a 4 wheel everything break job rotors are fine for now I guess same with pads but now I lost 620 dollars for a botched break job and I'm not rich so it will take a minute to get the things I need to stop the right way on my only vehicle.