damaged alloys

My drivers rear alloys are showing signs of corrosion. I have investigated why this was happening and I came to the conclusion it was hot brake dust as I have had some handbrake issues with my 197. The rear pads were sticking and causing them to overheat.
I have been to the dealership 3 times now to get this rectified but they still haven't sorted. So it's now going back. :coffee:
Anyone had this problem and any correct diagnosis, so I can give them the heads up? Also I suspect that the pads and discs have worn due to them not getting it sorted in the first place so does anyone recon I could get these replaced on the house. :clap::argue:
Secondly does anyone know a good wheel theropist in the north west to get them repaired and possibly re - sprayed?
Chris
 
I think most people have issues with pads sticking on the rear, mine do it and I remember thread with it happening to quite a few people!