Hair went back mostly blond after 15 days

Leah

So I paid 135 to get my hair done I was going from blonde to dark reddish brown hair and now only 15 days later I have red roots and very blond hair🤯 I wash my hair maybe 3 times a week so I know it’s not from washing it to much? Could it have been the dye she used? It’s never happened to me before??