Replacement 16mp rear camera is unfocused and "nodding"

The replacement camera focus is stuck and blurry, the quality looks arguably worse, and it "nods".

When I hold the camera still, the camera shifts downwards then back to the centre (when holding portrait-view-- left/right in landscape). You can see the camera lens move if you look directly at it.

I'm not sure what to do to fix this, or did I get a faulty one? When I opened the package, the camera was at the bottom of the box and not cushioned in-between the packing material so could it have been damaged during shipping.