I had the same issue, although I fed the next day with a small adult mouse about 10 -15 grams, and he took it. He was so uninterested in the fuzzy crawler that he actually rested his head on it.
With the small mouse, He did not even leave his hide. The mouse ventured in, but did not come out. The last one I fed him was even fatter. I would say closer to 20 grams. My snake is about 6 or seven weeks old. Its shocking that a smallish snake can eat a mouse this size. Lol...
I would say don't wait too long to refeed as I bet he is getting hungry. No need to assist feed as snakes can go a very long time without eating. Put in a small active hopper, turn the lights down low, and I'm sure he will eat it.
Good luck.
Todd