How do I go about convincing my aunt to stop perming my 6 year old niece's hair?

Sorry for the long a$$ ? but please read it all if you're going to answer. (back story: my brother's a single dad and our aunt's help to take care of her...ie doing her hair...before the perm she had beautiful thick long hair)

First off I live in a different state than they do so it's difficult to get my point across and then see if they listened. I do have permed hair myself and have been considering going natural for a long time now because of the affects it has had on my hair. I found out about a year ago that my aunt had gotten my niece's hair permed. She immediately asked my brother what I had to say about it...I said ';what is there to say, it's done now...'; I was NOT OKAY with it but like I said ...it had been done. Since then it has taken a very horrible turn like I predicted (I predicted this bc NONE of my aunts know how to properly care for a perm on a day to day basis. All they know is you got to keep getting them put in on a set schedule or your hair will start to come out. I know they don't know how to care for one because ALL of them have very thin short hair and can't do anything more with their hair than squeeze it back into a tiny thin pony tail (one of them even went completely 100% bald and now can only wear wigs for lack of taking care of her own hair!). They send her to a beautician to perm it but it is still coming out. I want to convince them (I've already convinced my brother who knows NOTHING about hair) to cut her hair shorter than short and keep braiding it so that she wont have a perm any more by the time her hair finishes growing back. I know this will take a long time but will be totally worth it because her hair looks like night and day from her natural hair to the mess that's sitting on top of her head now.

How bad is it coming out you say? Well at Christmas time the left side behind her ear was completely without a lick of hair. It trailed on down to the nape of her neck on the same side. I saw her again during MLK weekend and the entire right side and whole nape of neck (including left side) was now bald too! It looks like they took a set of clippers to the child's head! Not to mention the front of her hair is VERY thin! In just hat short amount of time it has ZERO hair in those places! So my question is how do I convince my aunt (because she's very disagreeable and older and stuck in her ways) that it will be hard and a long process but will be beneficial to the child to cut it all off a little at a time and try it again? I usually get in arguments with her about my niece and I do honestly believe I have a valid point on this one. We both really love my niece and she does help my brother in other ways that help but this is certainly no help. I don't want to offend her or argue but this HAS to stop before the child has self esteem issues (like I did as a child)because when she looks in the mirror all she sees is what she's left with on her head.How do I go about convincing my aunt to stop perming my 6 year old niece's hair?
Be blunt, say all those chemicals cannot be healthy for a child so young.How do I go about convincing my aunt to stop perming my 6 year old niece's hair?
if your neice likes it then let her, if not then get the niece to stop her.
Be nice about it and let her know someone commented on your niece's hair and tell her what the comment was. Maybe that will help.