Turkish lessons on asian side (Istanbul)

Hey everybody,
I arrived 12 days ago in Istanbul. Right now I am searching a good and not too expensive turkish class to improve my nearly not-existing turkish! I saw other threads refering to this subject but tbecause of the fact that I am living in Kartal, I prefer a school on the asian side rather than a 1,5 hour trip to Dilmer or Tomer...
Thanks for any kind of help!!!
Nils