Looking for a cosmetologist (Istanbul)

Hi,

I'm looking for someone who could help me take a really good care of my skin. There are a lot of beauty salons in Istanbul, but I'm not willing to risk it with my face.

I would appreciate if you could recommend a good cosmetologist. And by "good" I mean that this person will do only what's necessary without any radical treatments. The location doesn't matter - the quality and professionalism does.

Thank you!