I don't think (can someone confirm this?) that not eating veggies will be urgent for a short term period if he's eating pellets. Obviously it would be preferable, but I don't think he'll be really deprived of nutrients.
Provide a high quality pellet and you may want to supplement vit c in the meantime.
I started by offering the veggies mine liked and then adding to that a bit, and she seemed to try the veggies a little at a time. I am doing that now as I type, though, so we shall see the results!
He came from a pet store on Tuesday.