Boxster S Rotors badly gouged after "Specialist" rear wheel bearing replacement

[Cloudsurfer]

I'd guess the axle nuts aren't fully torqued, leaving the rotors too far outboard, and potentially having side to side play. It'd be almost impossible to change the alignment of the caliper, so I'd assume the problem to lie in the rotor.

Either way, make sure you get whoever did the work to pay for a bunch of new parts....