Huge disappointment

I went for my first botox treatment at this salon. I trusted the judgement of the owner on which treatment to take that would not take out my curls as that is my main hairstyle I wear which is wet curls. It's my 3rd week now and my hair is as straight as noodles and I hate it, my curl was taken out of my hair. I was very specific upon my requirement and was assured it won't take out my curls. I will NEVER go there again after such a huge disappointment.