You want to wait a week before each attempt if you offer too soon it will lead to more refusal.

The key is to make sure that your husbandry is optimal for that specific animal, that you do not handle until he starts eating for you, that you offer food in the enclosure, that you walk away when food is offered (any distraction can startle them and make them give up)

If the animal was eating F/T in the past there is no reason why he does not now, based on your description seems to me like he was interrupted if he coiled and let go.