Dear Fianne. I'm really glad that you have liked the apartment and that have found it clean and convenient. Regarding to the taxi, I'd like to explain a little. First, not all taxi drivers ahave valid license to take tourists to and from the airport. Second, the driver I work with is of my absolute trust (you could get robbed, it happens all the time) and he knows exactly how to reach the apartment, since most of other drivers get lost and take some time to them to locate the apartment. And third, this service includes waiting for you at the airport, even if your flight is delayed. So, as you can see, this is an optional service as good as it gets. It's possible that cheaper rides can be found (although you don't believe everything you hear on the streets) but I wouldn't recommend them, since I don't know the drivers. It's as simple as that. I'm sorry if you found excessive the price but you are the first customer in complaining about this.
All the best.