Help! hair colour gone awry..

my hair was black, and I just went to the hairdressars yesterday to get it done blond. so now its this weird yellow colour, and im wondering if it would be okay to dye over it with a bleach blonde box set type thing (though its meant for medium blonde hair and this is light yellow) would it go yellower or blonder?

Either way, you could end up over processing your hair and having it fall out. Some of the chemicals could react to your already chemical laden hair and cause burns, welts or a greenish hue. You might want to wait a few weeks before you try dying it again. It is pretty hard to get black hair to go blonde. You might want to wait the few weeks and go back to the hairdresser. They'll know if it will screw up your hair or make it fall. I speak from personal experience. Bald patches are not fun!

ARE YOU JOKING?! lmao what kind of hair dresser did you go to!!
I seriously would have you use Color OOPS hair remover color, use it, then go and buy a Dark or Medium Brown box dye, with NO ASH IN IT, it has to say Dark Brown, or Medium Brown, only.
I dont know what hair person you went to girl cause they should of told you have to STRIP I first.
GOOD LUCK.