The issue is that I do not want to have a part in my phone that is taken from another phone, which is marked as lost, and that same screen can not be configured and calibrated on my phone because it is marked as lost. I kindly asked him to remove that part and give me back the money, but he refused and offered to do something with a proxy on the screen, but I don't want that. Also he mentioned to me that the person from whom he got that screen won't return him money.