I'm still using the old Bose. Luckily, no cd skipping issue. I also have a cassette AUX thingy to listen to music from my smart phone. When I got my zed, the bass was cutting every now and then, but a simple relay replacement had sorted it out. I'm planning to swap it out with a new double din + reverse camera but currently saving for house so that will need to wait.
Sorry to hear about your issue there mate. Hope it's all sorted out on Monday and the seller takes full responsibility of it.