Rule of 3

My 10 year old lost his privileges a week ago Saturday. He has not accepted his consequences so I haven't started his 24 hours. If he tries to watch TV or get a snack I'll gently remind him he doesn't have his privileges right now and when he chooses to accept his consequences then I'll start his 24 hours. So my questions are, that the correct way to handle that? i feel that I'm reminding him several times a day and when i do get remind him in a calm tone he usually gets angry, swears at me or slams doors. And how do I handle negative behavior when he already lost his privileges? and last, at one point he did choose to accept his consequences and did some chores, (which I praised him for) so I started his time but then he gave up and wouldn't do anymore. I stopped his time and said he'd have to start over when ready but I'm not sure if that's the right way to handle it. Can you help me understand what I'm doing wrong? Thanks