I NEED TO LEARN TURKISH urgently!!

Today I went for a wander. Once it got dark, I took the minibus back from Kadikoy. Paid the driver with a 20, he didn't give me any change. I've been told already that you sometimes have to wait for change, but the drivers always remember and give it back. Started to get stressed as he seemed to have forgotten, or wasn't intending to give me my change.

I speak all of three words in Turkish and felt embarrassed to speak up on a really packed minibus and have everyone stare at me. Worked out how to say "my change" with the help of my phrase book. Muttered it to him, and he eventually thrust 8 lira at me. So either he thought I had paid with a 10, or was ripping me off. 10 YTL is about £4 and goes a long way here so there was no way I could let it go. EVERYONE was staring at me, I had to ask the whole minibus if anyone spoke English, as the driver was just ranting at me in Turkish. Eventually after acting out giving him a 20 and getting 8 back, people seemed to understand what had happened, and from what I could tell, were telling the driver off. He did give me the 10 back after much confusion and complaining. But I felt really embarrassed and flushed. I hate feeling helpless and not knowing any of the language.

I am supposed to be having Turkish lessons at the language school, but they need five students to go ahead with a class, and only have four at the moment.