I am on hold right now with Canon customer service trying to resolve the problems I am having with my Powershot A570. I am using some tips I learned from The Consumerist on How to Mind Control Customer Service Reps (great article!) and the supervisor, James, has just put me on hold after listening to my tale to "see what he can do".
At this point, I want a new camera and to never have to deal with the Canon repair facility again. They took my camera, repaired what was wrong and then broke something else. They returned the camera to me without even testing it or the problem would have shown up. I returned the camera (on their supplied UPS label) and got it back with that problem solved, but with a brand new problem--the focus lock no longer worked. I called and they emailed me another UPS label. I sent it and a week later got it back. And the focus lock still doesn't work consistently.
James transferred me to Roderick who, I was told, is their highest ranking customer service person and he took my information. He is sending me an overnight label to send the camera to the manager of the repair facility so they can check the camera out and see what's going on.
Final resolution...to be determined.