How to remove pink tones from blonde hair?

Last year My hair was black, and i got it stripped, and went to the salon several times to get it to the blonde i want. I have had highlights, lowlights, bleach, etc etc. But theres still pinkish splotches all over. I've used purple toner shampoo, but that dosnt seem to help. All the cosmetologists i've seen have no clue what to do/