Don't worry about it at all. My het pied girl hit the 900g wall and she hasn't eaten in about 2.5-3 months. She still does her typical roaming the cage in the evening and hasn't lost much weight. You just gotta wait it out and keep offering, sooner or later it will get hungry. Just think of it as, if the snake isn't sick, there is no chance that it will intentionally starve itself.