I am sorry to hear you had a problem with your booking, were you given a reason for the cancellation?
I have to say after 10 years of visiting the area & 4 years living 40 mins away from Finikounda this is the first time I have ever heard of any problems with these studios. I have known many people stay there year after year as well as one off visitors, all of whom have been happy with the booking & the accommodation. Any friends that visit & want to stay in or close to Finikounda & ask me for accommodation options would be given this place as one of the choices.
As this is a rare occurence I can only assume there was an unusual problem/circumstances & if you weren't given a reason I would ask for one. Sometimes these things happen & can't be helped, but without knowing why it's difficult to comment further.

Sonia-Kallisti Finikounda Studios must asks for a deposit o bail to guarantee the stay, It's necessary when one comes from another country.

I do not know if this is or not habitually but I believe that it's important to possible clients know what happened to us, in order they aren't without holidays rental.