Hair dying help.... how to get rid of orange?

so i have dyed my hair like 6 times in the past month in a half and ive been trying to fix it because it has this disgusting ORANGE tint that just wont go away i went to sallys and the lady said to get ash blonde and it would get rid of the orange and it did a little then i went back because there is still orange in it and i got more ash blonde and it got really orange again and I DONT KNOW WHAT TO DO im going to the beach tomorrow and i really dont want orange hair especially since were taking pictures at the beach im thinking about going to a beauty school since i cant afford to go to the salon is that a good idea? how much does it cost to get your hair done a beauty school or is there anyway to get rid of this orange tint cheap and fast that wont damage it too much more