Instagram privacy security sucks.....

Someone created an account using my niece's photos to promote ****ography, reported this incident with Instagram but nothing has been done and the account is still active. This is affecting her negatively as she is someone who lives with mental disorder and we are just worried for her well being at the moment. I am utterly disappointed with Instagram and it's lack of urgency regarding this matter. One would think this sort of thing would be attended to with the highest urgency seen as we have so much cyberbullying and youth suicide in this country