I will preface this review by noting that there was clearly miscommunication in this situation on both sides, but this is far and away the worst experience I've had on AirBnb.
We arrived at Evi's place early in the morning and she was gracious with accommodating check in - probably the only good thing of the entire trip. Upon arriving, we had booked for 1 person but arrived with 2 people and were moved to a different room. Later, we were told that there would be an extra charge for arriving with 2 people vs 1.
The first thing we noticed about the room was that there were dozens of ants all over the floor. No matter how clean we tried to keep the place (putting food in the fridge, taking trash out, etc.) ants kept reappearing day after day. There were also dozens of mosquitoes in the room every time we opened the door, and some even got in with all the doors and windows closed. The room was damp and felt quite old, akin to the $5 hostel rooms you pay for when traveling in Southeast Asia.
Because of this (and a few other reasons, like wanting to be closer to town for climbing) we decided to check out 2 days early. This was likely the initial misunderstanding - when we asked about this, Evi said that it was okay, which we took to mean we would be refunded for the 2 days we weren't staying and that charge applied to the extra 10 Euros/night for the second person.
When it became clear there was a misunderstanding, Evi's initial message was subtly threatening. She informed us that we had used the air conditioning despite it being late October and implied that we were not good guests and she would leave us a bad review. This, despite the fact that it was 75 degrees and the room receives full sun in the day with the curtains open!
The subtle threat left a sour taste in my mouth and is emblematic of the pushiness and lack of graciousness that we were treated with. Honestly, if the message had been kinder and not couched in a subtle threat, we probably would have just paid the extra money she demanded for the double room and not even tried to fight to get our money back for the last 2 days. Instead, her tone got continually worse and worse.
I HIGHLY recommend you read the other reviews, both on AirBnb and on Google, before booking this place. The pushiness and communication left a sour note on our entire vacation experience, a vacation that we had been saving up for all year (both financially and with vacation days). There are much better places to stay on the island.