Sorry but a 40 gallons for a 100 grams snake that is not eating is not gonna cut it, might look nice but it's not working.The breeder my son met that came over said our enclosure did look really good.
If the breeder had any experience troubleshooting young animals that fail to eat for their new owner that is the first thing he would have told you to do and it would have been to fix your husbandry.
You have nothing to lose you can either follow that link to a T and see how it goes over the next two weeks, or keep following advice from your vet and that breeder which obviously have not helped at this point.