What size tubs are they in and how many hides do they have? Are they in a rack system?

At this point, it is probably security that is the issue.

Did they eat for the breeder a few times before being given to you? Generally a breeder will not sell a hatchling that hasn't eaten at least 3 or 4 times.

Where are you trying to feed the snakes? what time of day?

There are many many more reasons why a snake won't eat besides those reasons. Force feeding is the very last option. Assist feeding is okay, but there are many things you can try first.