Need help with removing inactive neighbours in cafe world unwanted cater

Please help me here, I'm in a deep trouble. I have many neighbors who have joined my catering crew. I need to delete person who joins my catering crew & never contributes. I blocked them as a friend on facebook and they still joined my next job. Whats wrong? How do i kick them off my catering crew? Please need instruction or any piece of advice on this. I dont know why they joing my catering crew when they are not interested in working at all. This is so sick of such people. Any advice is welcomed! Thanks!