Offering too soon and too often, you do not have this BP for even a week.
I always recommend people with limited experience to wait at least a week before offering food the first time.
For the rest since it is likely that the refusal is stress or husbandry related or even both.
If you have not done so, switch the BP to a 6 quarts tub max until it reaches 150/200 grams. (Security is the number one priority for hatchling that small)
Use aspen as bedding. (Provides additional security)
Provide a hot spot of no higher than 86/87 (in a tub that small to high of temps do not allow much room to get away from the heat if the animals feel the need to)
Offer a 6 inches plastic flower pot saucer as an hide. (Provide tight hiding place = increase security)
Once you made the switch wait a week and offer food in the tub, offer what was offer before once a week.
DO NOT handle your BP until it eats for you 3 to 5 times and keep it to a minimum until the animal is a bit bigger.