hey! had this same problem with my hatchie bredli.. 6 months old and only eaten 3 times (4 now, successfully ate yesterday after 3 months)
it was really frustrating because people were telling me to check my temps, which were all perfect, get blood out of the mouse to make more attractive, was already doing that, was giving the mouse to him nice and warm, was defrosting the mouse in a freezer bag so it wouldnt lose its smell, he had hides, tank was right size, everything i had tried and he still didnt eat
eventually i learnt to calm down and stop worrying, that was the best thing i learnt. i kept trying and he took a feed yesterday, because he had just shed. if they are coming into a shed cycle, some refuse to eat, i think that was my problem. that and hes just a fussy eater. it really sucks but its such a good feeling when they finally eat
my advice is, keep trying, dont stress if he doesnt eat. he will eventually. if you go to get it out one day and its really pissed off looking, go get a mouse/rat whatever and try to feed it asap. good luck
also. check this video out. its from the guys at BHB enterprises (one of the biggest snake breeders in the world)
they have awesome informative videos on youtube
this one is made for snakes that wont eat, has some great tips
SnakeBytesTV-My Snake Won't Eat - YouTube