This is sadly a familiar experience. First time I tried to see her I had to call and call to get an appointment and then eventually got lucky as it was early afternoon and I was 5 minutes away.
Another girl working at the same place agreed to see me at 8pm on one evening, so I got there only to be told she was "going out to dinner" and would be back at 10pm. I said I could manage that and went to the pub to watch Wales against Portugal. 10pm came and I phoned to be told 10.30. So I waited and sure enough at 10.30 no response so I went home having spent a night out watching football.
These girls have no maid or booking system. It is just through luck or perseverance that you get through. It is very unprofessional but they are very much amateurs with nobody telling them how to run a place properly.