The customer support promptly responded
I had been using the Wolfbox G850 Pro for a year, but suddenly the camera image stopped appearing on the monitor altogether. I tried all the solutions described on the official website's customer support page, but the problem persisted, so I contacted them by email. They responded within 24 hours. I didn't have to deal with any confusing support or phone calls; they immediately sent me a replacement. I think it's worth noting that the customer support responded promptly throughout this process.