I think 'thanks for the offer, but it's OK, I'll look after it' would be enough of a response. Although I wonder if it took H some effort to offer to sort the appointment and scrip/the changes. Martians need to be needed. Is there any way you could let him feel like he's doing something good for you?
Just a thought. CEO recommended a place I could go to get good coffee so I'm going to pop over there tomorrow and try it!
