1988 Pontiac 6000 strut mounts noisy

I hads my front struts replaced and strut mounts. The one on the left makes a ticking sound when you go over bumps and the right one is stiff turning as if it was old and seizing up. These parts are only 6 monthes old. The mount on the right was replaced agian thinking it was defective and still no change. All parts are monroe