2005 Discovery 3 Front Brakes locking up

Hi all
I'm new here so please bare with me. We have a 2005 Discovery 3 absolutely love it, had new brake pads put on, a new master slave cylinder put on and a new battery and since then the front brakes keep locking up, they get really hot and have on occassion smoked quite badly. No one seems to know what the problem is! This is our first Discovery could anyone please help we are getting desperate.
Thanks in advance

Your in the wrong section ask in the Discovery...

Back to the garage, dont drive it until fixed, they have done something wrong.