This was a kit from petsmart. It is not returnable because everything is already opened.Did you get the enclosure you have and the stuff from petsmart or Petco? If you have the receipt you can return it.
So without the correct UVB baby will develop Metabolic Bone Disease. The limbs will bow and no longer be straight and the baby will not be able to climb. Then baby will eventually die. This is how you need to explain it to your parents. Right now the only way to help with this is taking baby outside in real sun 30 minutes each day.
I can give you the link for the proper UVB fixture and bulb.
Pull the heat fixture forward. in line with the UVB>