u/Zestyclose-Eggplant3

Hey all. Just bought a used pair of APM usb-c yesterday, they were like new (maybe even brand new, they came in full original packaging) and have been working fine since then. Today, I plugged them into my computer via usb-c cable, which I have done before with these, and the all of the buttons suddenly stopped working. They still play audio, and I can still use the buttons to do all of the factory reset nonsense, which I have done extensively, and they still won't work. Has anyone encountered this problem before, and if so, did they find a way to fix it? If not, how cooked am I? What am I looking at on repair costs and such? Thanks!