Have you tried Insworld Institute, the classes are only 8 students and everybody seems very friendly. It is run under the British system, so it feels more westernized, I went there to have a look around for my son.
If your from London, I would suggest an international school called Insworld Institute. It is smaller but it has a British principal and it follows the British syllabus. I'm British and my kid goes there, he has alot of British friends and the teaching is less stressful.