First off lets start with two basic items. Make sure your temps are correct and not too cool. As hard is it is try not to handle them too much until they get settled in. Let them have their own space without being hassled.
If you have been doing the above some hatching can be a chore to get to eat. I am sure you asked the person that you bought them from if they were eating. Most breeders will not even think of selling their hatchlings without them eating a meal or two. If you are trying with thawed prey, do you offer it from hemostats? Maybe all it will take is to wiggle the prey from the hemostats to trigger the feeding response. Another idea is to warm up the prey item above the ambient temps. This also seems to help at times. Sometimes all it will take is to offer a small rat instead of the mouse. If nothing else offer a stunned prey item and keep a close eye so that they do not get injured from the rodent. Keep trying and give a call to see what the breeder fed them before selling them.
They are still very young and I would not worry too much. I doubt that they have eaten more then a meal or two at most. Go luck to you and let us know how it goes.
Jim