Clio 197 creaking/clonking

Hi all, i recently purchased a 197, i have a strange metallic knock/creak when braking very harsh and pulling away very harsh. I have just fitted a 200 rack which was brand new from renault along with new track rods because i thought that was the problem. I have no play anywhere so im baffled. Renault said it is the brake pads but its far too loud to be that i think. Any help would be appreciated.

Regards lukemtb