Kitten is refusing milk?

For some kittens it is possible to use a tube that goes down their throat. I would talk to my vet about getting one of these tubes and careful, detailed instructions on how to use it. This way the kitten doesn't really have a choice, they will be getting nutrition either way. I've seen it done where kittens are fed like this for a couple weeks, until they are capable of elbowing their way into feeding times.