Is the point to grouse about Leica because it's expensive and you feel entitled, or to get your camera fixed so as to continue using it?
Obviously, one of the techs who worked on your camera (cleaning it) caused a problem. This is not Leica's fault, the fault of the camera, or your fault. It was most likely an accident, a human error. Getting all huffy about your "faith in Leica being broken" is just so much hot air and pretension over feeling entitled and not wanting to pay for a repair.
You should just want your camera set right again as it went to a shop for cleaning and came out damaged. Don't blame Leica for that; blame the people in the shop for screwing up, if you can prove it, and get them to pay for the repairs. If you can't prove they did it, either suck it up and pay for the repairs or sell it as is, and move on.
There's really no need for all the drama and BS.
G