Don't panic, I too have had this problem
I think generally it takes beardies a while to settle into their new home. Give them a few days to feel a bit more comfortable before you start to worry.
I assist fed mine with a bit of banana by gentle rubbing their jaws, once they got a taste for it they were unstoppable!
Just a tip: I also fed mine in ice cream containers but they wouldn't eat when they were in them. I found it was because they were stressed because they coudn't 'grip' onto the slippery plastic surface. I have since always fed them in their enclosure and they always eat!