What should I do about my brother who refuses to return a satellite receiver (dish) that I gave him, and he watches it and says that the sin falls on me because I invited him to this "misguidance"?

Your father was right to forbid it, and you erred by installing the device in your brother's house if you knew it would be used for unlawful purposes. You should have disposed of it. You do not bear its sin after you intended to remove it and your brother refused, because "no soul shall bear the burden of another." We advise you to make sincere repentance and try to remove the device from your brother's house. If you are unable to, "Allah does not burden a soul beyond its capacity." Among the conditions of repentance are ceasing the sin and removing its effects if possible.