Back story. I'm a manager in a large company. We are being briefed and briefed about looking after our employees welfare while they are working from home. My team is working all hours of the day to fit around their lives. I'm continuing to work office hours so that they know when I'm working, and we all have some kind of overlap. However I'm getting calls at all hours of all days and I can't cope with it, but it's being rammed into me that I need to support them. Am I being selfish? Can I ask them to back off or would that make me terrible?