It’s been 3 months since the treatment and the marks will not go away

My biggest regret is being treated by Dr Kay. I went to her for a Sculptra treatment in my buttocks. And sadly, this treatment has left huge purple marks on my skin. It’s been 3 months since the treatment and the marks will not go away. I contacted the office and they sold me some brightening pads to use on the marks. These pads have made absolutely no difference. I am horrified that I paid this woman over $5000 to leave permanent dark marks on my body.
Avoid making my mistake and find a better doctor for this treatment.