I sold a Corsair One PC to a guy on Carousell (Classifieds) in HK. After we met up and made the deal everything seemed fine. After about a day though he started messaging me about the PC not working and me being a scammer. I was quite shocked as I had just used the PC about a day before selling it to him and was certain everything worked. He said that he wanted his money back, but I had already used it to buy myself a laptop as I needed it for school and now he was threatining to call the police if I didn’t give him his money back. I have no idea why the PC isn’t working or if he may have done something to it and don’t have the money to pay back. Any help would be much appreciated!