i have a huge problem regrading my brakes ... they are very loose !! on 2005 Chevrolet Aveo

I have changed them 3 times but the same thing happen...
i started to think that the problem is not in the brake itself and that it could be in something else affecting its functionality

Does anyone know what i can do/change to fix it ???

Asked by for the 2005 Chevrolet Aveo
you will have to give a little more info on brakes being loose
when i push on them the car doesn't stop immediately even if i'm driving in a slow speed ( 60 km/hr) it always takes a distance of 2-3 m to stop completely
is the brake pedal spongy?