RELIABLE ISTANBUL AIRPORT TAXI NO FURTHER A MYSTERY

Oooh dear… I'm just cheated from the taxi driver… lol… He billed me three hundred TL from Sultan Ahmet to Umraniye… He used crossing tunnel from european to asian side… his taxi is business enterprise taxi (blue one particular)… bla bla bla… The hotel staff mentioned that Commonly all-around 100 TL. Who is right?We will likely want A