If she ruined you hair you shouldn't have had to pay, i am really sorry this happened to you, but i wouldn't have paid for that! on top of that she caused an injury on you too, so definitely, i wouldn't have paid for it.
I would recomend you go and see a specialist on color correction as well, and see what they say about it.
Don't feel depressed, there is a solution for everything, for now i'd say, let you hair breathe, get a dry hair treatment, and another thing you can do along with this is cut the ends of your hair every now and then, this will stimulate your hair growth as well
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I had a hair disaster more than a year ago, ( cause i bleached my own hair! ) turned out the same as yours and i had nothing left to do but to take better care of it afterwards, and that is what i did.
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