I never buy from breeders who will sell unstarted babies and I never sell unstarted babies. Some breeders will sell unstarted babies at a discount and advertise them as such, but then the snake is shipped to the buyer immediately with the understanding that they must have the experience to get the baby started eating their selves. That is the entire point if selling them at such a discount right out of the egg.
If he won't communicate with you and give you more details then send him one last email. In my opinion, he is being rather cold with you. Send one last email and be professional and polite. Request that he give you more info on the babies progress and if the baby is not eating well on his own and showing proper weight gain, suitable enough to be shipped out as a well started hatchling, then you would please like a refund because you have found a replacement elsewhere.
If he does not agree and/or you do not get a full refund, then you can request a refund through paypal because you did not receive the goods purchased.